Correcting Information in GSTR-1 Returns and Common Error Resolutions

Businesses can rectify information at both individual invoice and summary levels within their GSTR-1 filings. Each amendment type carries specific restrictions that taxpayers must understand to ensure accurate GSTR-1 submissions.

Selecting the Appropriate Filing Period for Amendments

The return filing period for an amendment must correspond to the period in which the correction is made. For instance, if an amendment is performed in August, the relevant return filing period would be:

• August, if the taxpayer files monthly returns.
• September (for the July-September quarter), if the taxpayer files quarterly returns.

Invoice-Level Amendments Overview

The following categories of amendments are permissible at the invoice level:

• B2B Amendments
• B2C Large Amendments
• Credit/Debit Notes (Registered) Amendments
• Credit Debit Note (Unregistered) Amendments
• Export Invoices Amendments

Summary-Level Amendment Details

Summary-level amendments encompass:

• B2C Others Amendments
• Advances Received (Tax Liability) Amendments
• Adjustment of Advances Amendments

Deadlines for Making Amendments

Amendments can be carried out in a subsequent tax period. However, the revised amended invoice date cannot be later than the last day of the original invoice’s tax period. For example, if an original invoice dated July 12, 2023, is being amended in August 2023, the amended invoice date must not be after July 31, 2023.

Invoice-Level Details Not Subject to Amendment

Certain details cannot be modified at the invoice level:

• It is not possible to change a tax invoice into a bill of supply.
• The type of export (with or without payment) cannot be amended.
• For Credit/Debit Notes, details such as the Place of Supply, Customer GSTIN, or applicability of Reverse Charge are tied to the original invoice and must align with its details.
• If the recipient of goods has already acted on the invoices by accepting or modifying them, the taxpayer will be unable to amend those specific invoices; they will not be available for modification.

Summary-Level Details That Cannot Be Modified

The following details cannot be amended at the summary level:

• Nil-rated and HSN summary details of outward supplies cannot be changed.
• A new Place of Supply cannot be added.

Place of Supply Amendments and Their Restrictions

For all three types of summary-level amendments, tax details are always based on the Place of Supply (POS) and the applicable tax rate. Consequently, amendments to both these details must be performed at the summary level only.

If one detail is amended, other linked details will automatically update. For instance, if you had previously reported 5% and 12% tax rates under a Karnataka POS and now wish to amend only the 5% tax values, you must re-enter the amended values for the 5% tax and also re-enter the original values for the 12% tax.

The original POS forms the basis for all amendments. While you can amend the original POS and replace it with another, this is subject to specific conditions.

Illustrations on Amendments

Here are examples demonstrating various amendment possibilities.

Common Error Messages and Their Causes During Amendments

When uploading returns with invoice or summary-level amendments, taxpayers might encounter specific error messages. The table below lists common errors and the underlying mistakes that cause them.