To amend (correct) an export invoice in GST, you can use the amendment facility in GSTR-1 for the period following the original invoice period. The amendment is usually needed for errors such as in invoice value, shipping bill number, port code, or any export-specific detail.

Step-by-Step: How to Amend an Export Invoice in GST

1. Log in to the GST portal using your credentials.​
2. Go to Services > Returns > Returns Dashboard.

1. Select the appropriate financial year and tax period for the amendment (the month after the original invoice was reported).

1. In GSTR-1, navigate to the “Amendments to Outward Supplies” section.
   • For export invoices, use the section for “Amendments to exports of goods or services” (often Table 9A for previous period amendments).

1. Select “Amend Export Invoices” and enter:
   • The original invoice number and date.
   • The corrected details such as value, shipping bill, port code, etc..

1. Save and submit the amendment with your GSTR-1 for that period.

Important Points

• You cannot amend the original financial year; the amendment must be made in the subsequent period’s GSTR-1.​
• Some fields (like supply type—export with/without payment, GSTIN of your entity) cannot be changed via amendment. If the invoice period is very old or the error involves a core field, you’ll need to disclose/rectify in your annual return (GSTR-9) as well for complete compliance.​
• There is a time limit: generally, up to 30th November of the year following the relevant financial year or filing of annual return, whichever is earlier.​

Amending export invoices in this way ensures records match for GST compliance and that any export refunds (if applicable) can be processed correctly.

Thanks,