E-Invoice Validation Error Codes and Fixes: Complete IRP Troubleshooting Guide

Q: What does error code 2150 mean?

Error code 2150 means that an IRN has already been generated for the document. Retrieve the existing IRN instead of resubmitting the invoice.

Q: What is error code 2305?

Error code 2305 relates to a document date outside the reporting window permitted for the taxpayer's turnover category. For businesses with an Annual Aggregate Turnover (AATO) of ₹10 crore or more, eligible documents must currently be reported within 30 days.

Q: Can I edit an e-invoice after IRN generation?

No. An e-invoice cannot be edited directly on the IRP after IRN generation. It may be cancelled within the permitted period or corrected through the applicable return, credit note or amendment process.

Vikash

28 Jun 2026 • 18 min read

E-Invoice Validation Error Codes and Fixes

An e-invoice error occurs when the Invoice Registration Portal cannot validate the invoice data submitted for Invoice Reference Number generation.

The error may be caused by something as simple as an incorrect PIN code or as complex as a mismatch between line-item tax calculations and invoice-level totals. Until the error is corrected, the IRP will not generate a valid IRN and signed QR code.

For businesses issuing a high volume of B2B invoices, repeated e-invoice validation errors can delay dispatch, customer payments, e-way bill generation and GST return preparation.

This guide explains the most common e invoice error codes, what causes them and how to fix them before resubmitting the invoice.

Key Takeaways

An IRN is generated only after the invoice passes the IRP’s schema, tax, GSTIN and business-rule validations.
Do not keep resubmitting the same invoice without understanding the error message.
Duplicate IRN, invalid GSTIN, incorrect HSN, tax mismatch and place-of-supply errors are among the most common issues.
Invoice-level totals must reconcile with line-item taxable values, taxes, cess, discounts and other charges.
The supplier GSTIN, recipient GSTIN, state code and PIN code must agree with each other.
Businesses with AATO of ₹10 crore or more cannot report eligible documents after the applicable 30-day window.
From 1 June 2025, invoice numbers are treated as case-insensitive during IRN generation.
Certain RSP-based invoice validations were relaxed from 1 February 2026.
Additional Ship-to GSTIN validations are scheduled to apply from 1 August 2026 where an e-way bill is generated with or through an IRN.

What Are E-Invoice Validation Errors?

An e-invoice validation error is a rejection message returned by an Invoice Registration Portal when the submitted invoice does not satisfy the prescribed e-invoice schema or GST business rules.

Before generating an IRN, the portal validates details such as:

supplier GSTIN;
recipient GSTIN;
document type;
invoice number;
invoice date;
transaction type;
HSN or SAC code;
quantity and unit;
taxable value;
GST rate;
CGST, SGST and IGST;
place of supply;
state and PIN code;
export details;
invoice-level totals;
duplicate-document status.

If one or more fields fail validation, the request is returned with an error code and message.

Businesses can refer to the official NIC IRP error-code list when diagnosing a rejected request.

E-Invoice Error vs GST Invoice Error

An e-invoice error and a general GST invoice error are related but not identical.

GST invoice error	E-invoice validation error
A mistake in the invoice created by the business	A validation failure returned by the IRP
May involve a missing mandatory field	May return a numbered error code
Can exist before the invoice is sent to the IRP	Occurs during IRN generation or another IRP operation
May affect GSTR-1 or buyer ITC later	Immediately prevents or restricts IRN processing
Examples include wrong address or tax rate	Examples include codes 2150, 2176, 2189 and 3028

For general invoice mistakes, refer to the GimBooks guide on common GST invoice errors.

Types of E-Invoice Errors

Most e-invoice error codes fall into one of the following categories.

Master-Data Errors

These involve incorrect or outdated:

GSTINs;
state codes;
PIN codes;
HSN or SAC codes;
units of measurement;
customer details;
supplier details.

Tax-Calculation Errors

These occur when:

CGST and SGST are unequal;
IGST is used for an intrastate transaction;
CGST and SGST are used for an interstate transaction;
line-item tax does not match the tax rate;
invoice-level tax totals do not match line-item totals.

Document Errors

These include:

duplicate invoice numbers;
future invoice dates;
invalid document types;
unsupported characters;
incorrect invoice-number format;
reuse of a cancelled invoice number.

Transaction-Type Errors

These arise when:

B2B is selected instead of export;
URP is used where a registered GSTIN is required;
an SEZ transaction is classified incorrectly;
reverse charge is selected for an ineligible transaction;
place of supply does not match the transaction type.

API and Authentication Errors

These usually affect ERP, GSP or API users and may involve:

expired tokens;
incorrect client ID or secret;
invalid user credentials;
header GSTIN mismatch;
incorrect payload structure;
application or server failure.

Quick E-Invoice Error Code List

Error code	Error or rejection	Common cause	Recommended fix
2150	Duplicate IRN	The document was already submitted and an IRN exists	Retrieve the existing IRN instead of sending another generation request
2163	Future document date	The invoice date is later than the current date	Correct the document date
2172	IGST used for intrastate supply	Supplier state and place of supply are the same	Apply CGST and SGST unless a permitted exception applies
2174	CGST/SGST used for interstate supply	Supplier state and place of supply differ	Apply IGST
2176	Invalid HSN code	Incorrect, obsolete or unsupported HSN/SAC entered	Verify the code against the IRP HSN master
2177	Invalid UQC	Unit code does not match the IRP master	Use the permitted Unit Quantity Code
2182	Taxable-value total mismatch	Sum of line-item taxable values differs from invoice taxable value	Recalculate and reconcile line-item and invoice totals
2183–2185	GST total mismatch	Line-item SGST, CGST or IGST totals differ from invoice totals	Recalculate invoice-level tax totals
2189	Invalid total invoice value	Invoice total does not reconcile with items, taxes, charges and discount	Correct the total-value formula
2192	Quantity × unit-price mismatch	Line-item amount does not equal quantity multiplied by price	Recalculate the item’s gross value
2193	Assessable-value mismatch	Discount has not been deducted correctly	Use taxable value equal to total amount minus discount
2194	Item-total mismatch	Taxable value, taxes, cess and charges do not add up	Correct the line-item total
2211	Supplier and recipient GSTIN are the same	Self-invoice entered as a normal supply	Correct the transaction or recipient GSTIN
2212	Recipient GSTIN cannot be URP	URP used for a B2B transaction	Enter the buyer’s valid GSTIN
2227	CGST and SGST are unequal	Different values entered for the two taxes	Enter equal CGST and SGST amounts
2228	Item list is empty	Invoice submitted without line items	Add at least one valid item
2230	IRN cannot be cancelled because an e-way bill exists	Active e-way bill is linked to the IRN	Cancel the eligible e-way bill first, then cancel the IRN
2233	Duplicate serial numbers	Two line items use the same serial number	Assign a unique serial number to every item
2234	CGST/SGST amount mismatch	Tax does not match taxable value and rate	Recalculate tax for the affected item
2235	IGST amount mismatch	IGST does not match taxable value and rate	Recalculate the IGST value
2238	Quantity missing	No quantity passed for a line item	Enter the item quantity
2239	Unit missing	UQC not passed for the item	Enter a valid unit code
2240	Invalid GST rate	Unsupported or incorrect tax rate passed	Verify the applicable GST rate and rate master
2243	Invalid place-of-supply code	Incorrect state code used for POS	Select a valid state or territory code
2248	Export recipient not marked URP	Registered GSTIN entered for an export recipient	Use URP for the recipient where required
2255	Empty request payload	No valid invoice data transmitted	Correct the JSON or upload file
2258	Supplier state-code mismatch	Supplier GSTIN prefix differs from supplier state	Align the state code with the first two GSTIN digits
2265	Recipient state-code mismatch	Buyer GSTIN prefix differs from buyer state	Correct the buyer state or GSTIN
2270	Cancellation time crossed	IRN cancellation attempted after the allowed period	Use the appropriate return-amendment or credit-note process
2275	Export PIN code error	Direct export recipient PIN is not 999999	Use 999999 where the prescribed export scenario requires it
2278	Cancelled document number reused	New IRN requested for a previously cancelled document number	Issue a new invoice number
2284 / 2305	Document outside permitted reporting period	Invoice is older than the applicable IRP reporting window	Verify the date and applicable turnover-based restriction
2288 / 3028	Invalid recipient GSTIN	Buyer GSTIN is invalid or unavailable in the IRP database	Check the GSTIN and sync or update it from the GST portal
2295	IRN already generated through another IRP	The same document was registered on another portal	Retrieve the existing IRN and stop resubmission
3026	E-invoice not enabled for GSTIN	GSTIN is not enabled in the IRP system	Check applicability and enablement status
3029 / 3076	GSTIN inactive or cancelled	Supplier or recipient registration is not active	Verify GSTIN status and transaction date
3038	PIN code does not exist	Invalid postal code entered	Enter a valid six-digit PIN code
3039	PIN code does not belong to state	PIN and state mapping do not match	Correct either the PIN or state
3047	HSN does not belong to goods	A service-classification code may have been used for goods	Select the correct goods HSN
3048	HSN does not belong to services	A goods HSN may have been used for services	Select the correct SAC/service classification
5001 / 5002	Application or schema error	Invalid payload, server issue or missing conditional field	Validate the schema and retry; escalate if the error persists

How to Fix the Most Common E-Invoice Errors

Error Code 2150: Duplicate IRN

Why It Happens

The same document has already been registered, or the billing system sent the IRN-generation request more than once.

This often happens when:

the user clicks Generate repeatedly;
the API times out but the IRN is successfully created;
two users submit the same invoice;
an automatic retry runs before the original response is stored;
the invoice was generated through another IRP.

How to Fix It

Do not create another invoice immediately.

First:

Search for the document using its invoice number, date and document type.
Check whether an IRN already exists.
Retrieve the IRN and acknowledgement details.
Update the accounting record with the existing IRN.
Disable duplicate retry requests for the same document.

If the invoice was registered through a different IRP, the same IRN remains valid across the e-invoice system.

Error Codes 2172 and 2174: Wrong Tax Type

Error 2172

This occurs when IGST is entered for a transaction that appears to be intrastate.

For a standard intrastate transaction:

supplier state = place of supply;
CGST and SGST generally apply.

Error 2174

This occurs when CGST and SGST are entered for a transaction that appears to be interstate.

For a standard interstate transaction:

supplier state ≠ place of supply;
IGST generally applies.

How to Fix Them

Review:

supplier state code;
buyer state code;
place of supply;
bill-to and ship-to arrangement;
transaction type;
GST treatment.

Do not fix the error by changing the tax type alone. Confirm that the place of supply is legally correct for the transaction.

Error Code 2176: Invalid HSN Code

Why It Happens

The HSN or SAC submitted does not match the IRP’s classification master.

Possible reasons include:

typing error;
obsolete code;
insufficient number of digits;
goods classified as services;
services classified as goods;
spaces or special characters;
product master not updated.

How to Fix It

Search for the HSN or SAC through the IRP master.
Confirm whether the item is goods or services.
Check the required number of HSN digits.
Update the item master in the billing software.
Regenerate the request.

Taxpayers with AATO above ₹5 crore are generally required to report six-digit HSN codes for outward supplies. Use the official HSN-search functionality rather than guessing a code.

Error Code 2177: Invalid Unit Quantity Code

The unit entered in the invoice does not match the permitted UQC master.

For example, an internal unit such as “BOXES” may need to be mapped to a recognised unit code.

Fix

check the official UQC master;
map internal units to accepted codes;
update the item master;
avoid manually entering a new unit for every invoice.

Error Codes 2182–2189: Invoice-Level Total Mismatches

These errors indicate that the totals submitted at invoice level do not agree with the sum of line items.

A valid reconciliation should broadly follow:

Total taxable value = Sum of taxable values of all line items

Invoice value = Taxable value + GST + cess + other charges − invoice-level discount

The portal allows only prescribed rounding tolerance.

Fix

Check:

item quantity;
unit price;
line discount;
taxable value;
tax rate;
CGST and SGST;
IGST;
cess;
other charges;
round-off;
invoice-level discount.

Avoid manually overriding the final invoice total after line-item values have been calculated.

Error Code 2193: Assessable Amount Is Incorrect

The assessable or taxable value for a line item should normally equal:

Total item amount − discount

Example:

Particular	Amount
Quantity × unit price	₹10,000
Discount	₹500
Correct assessable value	₹9,500

If ₹10,000 is sent as the assessable value while a ₹500 discount is also reported, the IRP may reject the request.

Error Codes 2194, 2234 and 2235: Item-Level Tax Mismatch

These codes occur when the item’s final value or tax does not agree with the taxable value and GST rate.

Standard Fix

Recalculate:

assessable value;
CGST and SGST;
IGST;
cess;
other charges;
total item value.

Important 2026 Update for RSP-Based Invoices

From 1 February 2026, specified item-value validations were relaxed for invoices involving notified HSNs subject to Retail Sale Price-based tax calculation.

For qualifying invoices:

error 2194 may be suppressed;
error 2234 may be suppressed;
error 2235 may be suppressed.

The relaxation applies only when the prescribed RSP-based conditions are met. Businesses should not disable their normal tax checks for other invoices.

Error Code 2211: Supplier and Recipient GSTIN Are the Same

The IRP does not accept an ordinary e-invoice where the supplier and recipient GSTIN are identical.

Fix

Check whether:

the wrong customer was selected;
the supplier GSTIN was copied into the buyer field;
the transaction should be treated through another GST mechanism;
the document is an internal transfer requiring a different GSTIN or branch treatment.

Error Code 2212: URP Used in a B2B Transaction

URP represents an unregistered person. It cannot be used as the recipient GSTIN for a standard B2B transaction.

Fix

enter the registered buyer’s GSTIN;
change the transaction type if the customer is genuinely unregistered;
verify whether the document requires an e-invoice.

Error Code 2227: CGST and SGST Are Unequal

CGST and SGST should generally be equal for a standard intrastate supply.

Example:

Tax	Incorrect	Correct
CGST	₹900	₹900
SGST	₹850	₹900

Fix

Recalculate both taxes using half of the applicable combined GST rate.

Error Code 2233: Duplicate Item Serial Numbers

Each line item in the e-invoice JSON must have a unique serial number.

The following will fail:

Item 1: serial number 1
Item 2: serial number 1

Use:

Item 1: serial number 1
Item 2: serial number 2

This is different from the product SKU or batch number. It is the sequence of items within the invoice payload.

Error Code 2240: Invalid GST Rate

The tax rate submitted does not match a permitted rate in the IRP master or is not applicable in the submitted format.

Fix

verify the item’s HSN/SAC;
check the notified GST rate;
update the tax-rate master;
avoid free-text rate values;
confirm whether the item is exempt, nil-rated or taxable.

Do not change the rate only to pass portal validation. The GST treatment must be legally correct.

Error Codes 2258 and 2265: GSTIN and State-Code Mismatch

The first two digits of a GSTIN represent its state or jurisdiction code.

If the GSTIN begins with 27, but Maharashtra is not selected as the related state, the system may reject the record.

Fix

Check:

GSTIN;
supplier state;
recipient state;
billing address;
shipping address;
state code;
place of supply.

Update the party master so the mistake is not repeated on future invoices.

Error Code 2270: IRN Cancellation Time Limit Crossed

An IRN can generally be cancelled on the IRP only within 24 hours of generation, subject to applicable conditions.

After the cancellation window closes, the portal will reject the cancellation request.

Read the GimBooks guide on e-invoice cancellation vs amendment for the appropriate correction workflow.

Error Code 2278: Reusing a Cancelled Invoice Number

Once an IRN for a document number has been generated and subsequently cancelled, the same supplier cannot generate another IRN using that same document number.

Fix

Create the corrected invoice using a fresh, unique invoice number.

Do not attempt to alter only the invoice date or letter case.

Error Codes 2284 and 2305: Invoice Outside Reporting Window

These errors indicate that the document date is older than the reporting period permitted for the taxpayer.

From 1 April 2025, businesses with AATO of ₹10 crore or more must report eligible invoices, debit notes and credit notes within 30 days of the document date.

For example, a document dated 1 April must be reported on or before 30 April.

Read the E-Invoice 30-Day Reporting Checklist for a complete deadline-control workflow.

Fix

verify that the document date is correct;
confirm the taxpayer’s AATO;
check whether the document is covered;
stop backdating invoices;
generate IRNs on the same day or next day;
escalate expired documents to a GST professional.

Changing a genuine document date only to bypass the validation may create serious compliance problems.

Error Codes 2288, 3028, 3029 and 3076: GSTIN Errors

These errors occur when the GSTIN is:

structurally invalid;
not available in the IRP database;
inactive;
cancelled;
not valid on the document date.

Fix

Check the GSTIN on the GST Portal.
Confirm the legal name and registration status.
Check the effective registration or cancellation date.
Use the Sync GSTIN or Update option where available.
Correct the customer or supplier master.
Resubmit the invoice only after validation.

Error Codes 3038 and 3039: PIN-Code Validation

Error 3038

The submitted PIN code does not exist in the system master.

Error 3039

The PIN code is valid, but it does not belong to the selected state.

Fix

Verify:

dispatch-from PIN;
supplier PIN;
buyer PIN;
ship-to PIN;
selected state code.

Do not use a head-office PIN code for every customer or warehouse.

Error Codes 3047 and 3048: Goods/Services Classification Mismatch

Code 3047

The submitted HSN does not belong to goods.

Code 3048

The submitted code does not belong to services.

Fix

confirm whether the item is a product or service;
use the appropriate HSN or SAC;
update the item category in the billing system;
check mixed invoices carefully.

Error Codes 1005, 1010, 1015 and 1019: API Authentication Problems

These codes mainly affect API-integrated systems.

Code	Issue	Fix
1005	Invalid or expired token	Generate a fresh authentication token
1010	Invalid client ID or client secret	Verify the API credentials
1015	Header GSTIN does not match token user	Pass the correct GSTIN
1019	Incorrect password	Reset or correct the API-user password

API users should also verify whether they are using sandbox credentials in production or production keys in the sandbox.

Error Codes 5001 and 5002: Application or Schema Failure

These errors can have different causes depending on the operation being performed.

Possible causes include:

missing mandatory field;
incorrect JSON data type;
unsupported schema version;
invalid field length;
malformed payload;
server-side application issue;
new conditional validation.

Fix

Validate the payload against the latest schema.
check required and optional fields;
verify maximum field lengths;
retry after a short interval for server errors;
retain the request JSON, error response and timestamp;
raise a support ticket if the issue continues.

New Ship-to GSTIN Validations from 1 August 2026

GSTN has announced additional validations for transactions where an e-way bill is generated along with an IRN or subsequently through an IRN.

From 1 August 2026:

Ship-to GSTIN will become conditionally mandatory where Ship-to details are provided and an e-way bill is required.
If the Ship-to party is unregistered, URP may be entered where applicable.
Bill-to and Ship-to GSTINs must not be the same in a genuine Bill-to/Ship-to transaction.
Ship-to GSTIN, state code and PIN code will be validated together.

Indicative validation codes include:

Code	Upcoming validation
5002	Ship-to GSTIN missing when Ship-to details are supplied
2323	Bill-to and Ship-to GSTIN are the same
2325	Ship-to GSTIN state does not match Ship-to state code
3039	Ship-to PIN does not belong to the selected state
5001	GSTIN missing in the e-way bill-by-IRN shipping details
2324	Existing B2B or SEZ Ship-to details are being replaced
4074	Ship-to state does not match GSTIN in e-way bill-by-IRN flow

Businesses using ERP or API integration should update and test their system before the production implementation date.

Refer to the official GSTN June 2026 advisory on Ship-to GSTIN changes.

Invoice Numbers Are Now Case-Insensitive

From 1 June 2025, IRPs treat invoice and document numbers as case-insensitive.

This means:

inv-101
INV-101
Inv-101

are treated as the same document number for IRN generation.

The number is normalised to uppercase to reduce duplicate IRNs and align treatment with GSTR-1.

Businesses should standardise invoice numbering in their billing software rather than relying on uppercase and lowercase differences.

Step-by-Step Process to Resolve Any IRP Error

Step 1: Save the Exact Error Response

Record:

error code;
complete message;
invoice number;
document date;
GSTIN;
date and time;
request source;
submitted JSON, where applicable.

Step 2: Identify the Error Category

Classify it as:

master data;
tax calculation;
document detail;
transaction type;
date/time-limit;
API/authentication;
portal/server.

Step 3: Compare the Invoice With Source Records

Check the invoice against:

customer master;
product master;
GSTIN search;
HSN master;
tax-rate master;
sales order;
dispatch information;
place-of-supply rules.

Step 4: Correct the Source, Not Only the Upload File

If the customer state is wrong in the billing software, correct the party master. Editing only one JSON file allows the same error to recur.

Step 5: Recalculate the Invoice

Regenerate:

taxable value;
discount;
GST;
cess;
item totals;
invoice total.

Step 6: Resubmit Only Once

Avoid repeated clicks or parallel API calls. Wait for the response and store the IRN immediately.

Step 7: Confirm Successful IRN Generation

Verify that the response includes:

IRN;
acknowledgement number;
acknowledgement date;
signed invoice;
signed QR code;
active status.

Infographic: IRP Error Resolution Workflow

Recommended placement: Immediately after the general troubleshooting process.

E-Invoice Error Fix Flow

IRP REJECTS THE INVOICE↓Save error code, message, JSON and timestamp↓IDENTIFY THE ERROR TYPE

GSTIN or master-data error
HSN/UQC error
Tax calculation mismatch
Invoice-date or duplicate error
Place-of-supply error
API or schema error

↓Compare invoice with customer, item and tax masters↓Correct the original record in the billing system↓Regenerate totals and JSON↓Validate the invoice again↓Submit one controlled request↓Store IRN, acknowledgement and QR code↓Add the cause to an internal error-prevention log

Suggested infographic title:How to Fix E-Invoice Validation Errors

Suggested alt text:E-invoice error-code resolution workflow for fixing IRP validation errors

How to Prevent E-Invoice Errors

Validate GSTINs Before Billing

Do not wait until IRN generation to discover that the buyer’s GSTIN is incorrect or inactive.

Maintain a Controlled Item Master

Each product or service should have:

correct HSN/SAC;
goods/service classification;
GST rate;
valid UQC;
description;
cess treatment, where applicable.

Automate Tax Calculation

Avoid manually typing CGST, SGST and IGST values.

Standardise Invoice Numbers

Use one invoice-number sequence per configured series and financial year. Do not distinguish invoices only by letter case.

Generate IRNs Immediately

Same-day IRN generation reduces the risk of missed reporting limits and month-end backlogs.

Monitor Error Frequency

Maintain a report showing:

Error code	Occurrences	Root cause	Responsible team	Corrective action
2176	12	Incorrect HSN master	Product team	Update HSN mapping
2265	8	Customer-state mismatch	Sales team	Validate party master
2189	5	Manual round-off override	Billing team	Lock total formula

A repeated code usually indicates a process or master-data problem rather than a one-time user mistake.

How GimBooks Helps Reduce E-Invoice Errors

GimBooks helps businesses create and manage GST-compliant invoices through a structured digital workflow.

Its e-invoicing capabilities support:

GST invoice creation;
customer and item masters;
GST calculations;
HSN/SAC details;
IRN generation;
QR-code inclusion;
e-way bill workflows;
invoice records and reports;
digital invoice sharing;
mobile and web access.

By maintaining invoice data in a central billing system, businesses can reduce repeated manual entry and identify incorrect values before they become IRP rejections.

A recommended process is:

Create invoice in GimBooks → verify GSTIN and item data → review tax and place of supply → generate e-invoice → confirm IRN and QR code → store and share the authenticated invoice

Explore the GimBooks e-invoicing solution or follow the guide on how to create an e-invoice with GimBooks.

E-Invoice Validation Checklist Before IRP Submission

Document Details

Invoice number is unique
Document type is correct
Document date is not in the future
Invoice is within the applicable reporting period
Cancelled invoice number has not been reused

GSTIN and Address

Supplier GSTIN is active
Recipient GSTIN is valid
GSTIN state code matches selected state
PIN code belongs to the selected state
Bill-to and Ship-to details are correct
Export recipient is treated correctly

Item Details

Every line has a unique serial number
HSN or SAC is valid
Goods/services classification is correct
Quantity is entered
UQC is valid
Description meets schema requirements

Tax and Value

Quantity × price is correct
Discounts are deducted correctly
Taxable value is correct
CGST and SGST are equal where applicable
IGST is used for interstate supply
Item taxes match the GST rate
Line totals match invoice totals
Round-off is within permitted tolerance

Submission

Latest schema is being used
Authentication token is valid
Correct GSTIN is passed in the API header
Request is submitted only once
IRN response is stored
Signed QR code is added to the final invoice

Frequently Asked Questions

What are e invoice error codes?

E invoice error codes are numbered rejection messages returned by the Invoice Registration Portal when invoice data fails schema, GSTIN, tax, HSN, date or business-rule validation.

Why is my e-invoice not generating?

An e-invoice may not generate because of an invalid GSTIN, incorrect HSN code, duplicate invoice, tax-value mismatch, place-of-supply error, expired reporting window or technical API failure.

What does error code 2150 mean?

Code 2150 means that an IRN has already been generated for the document. Retrieve the existing IRN instead of resubmitting the invoice.

How do I fix an invalid HSN error?

Verify the HSN or SAC through the IRP master, confirm whether the item is goods or services, update the item master and resubmit the corrected invoice.

Why does the IRP show a taxable-value mismatch?

The sum of line-item taxable values does not match the invoice-level taxable value. Recalculate quantities, prices, discounts and taxable amounts.

Can I use the same invoice number after cancelling an IRN?

No. Once an IRN has been generated and cancelled, the same supplier cannot generate another IRN using that document number. Use a new invoice number.

How do I fix an inactive GSTIN error?

Check the GSTIN on the GST Portal, confirm its registration status and effective dates, update or sync the GSTIN on the IRP and correct the customer or supplier master.

What is error code 2305?

Code 2305 relates to a document date outside the reporting window permitted for the taxpayer’s turnover category. For businesses with AATO of ₹10 crore or more, eligible documents must currently be reported within 30 days.

Can I edit an e-invoice after IRN generation?

The invoice cannot be edited directly on the IRP after IRN generation. It may be cancelled within the permitted period, or corrected through the applicable return, credit-note or amendment process.

What should I do if an IRP application error continues?

Save the request JSON, error response and timestamp, validate the schema, retry after a short interval and raise a ticket with the IRP helpdesk if the error persists.

Conclusion

Most e-invoice validation errors are preventable.

They usually originate from four areas:

inaccurate customer or item master data;
incorrect transaction classification;
mismatched tax calculations;
uncontrolled invoice-generation processes.

The fastest way to fix an IRP error is to identify the exact code, correct the source record, regenerate the invoice data and resubmit one controlled request.

Businesses should not treat error resolution as a final portal task. Repeated errors must be traced back to customer onboarding, product classification, tax configuration, billing controls or API integration.

Using GimBooks e-invoicing software can help businesses maintain structured GST invoice data, reduce manual entry and manage IRN generation through a more organised billing workflow.

Create accurate GST invoices and simplify e-invoicing with GimBooks.