In the given case, the SEZ unit raised an export invoice in April 2026 and reported it in GSTR-1. Subsequently, in May 2026, the export transaction was cancelled and no shipping bill/BOE was filed. Since the invoice was validly issued and already reported in GSTR-1, the preferred GST treatment would be to issue a Credit Note (CN) in May 2026 and report the same in the GSTR-1 of May 2026.
This approach is supported by Section 34 of the CGST Act, which permits issuance of a credit note where the original supply is cancelled or the value of supply reported earlier exceeds the actual supply made. In the present case, as the export has not materialized and the underlying transaction stands cancelled, the credit note effectively reverses the supply reported earlier.
Amending the export invoice is generally used to correct details of an existing supply, such as invoice value, shipping bill particulars, port code, etc. It may not be the appropriate mechanism where the entire transaction itself has been cancelled after the invoice has already been reported.
Accordingly, the following course of action is recommended:
- Cancel the export invoice in the accounting/ERP system.
- Issue a credit note in May 2026 against the original export invoice.
- Report the credit note in the GSTR-1 of May 2026 with reference to the original invoice.
- Maintain supporting documentation such as invoice cancellation records, customer communication, and internal approvals evidencing cancellation of the export order.
Therefore, considering that the export invoice was already disclosed in GSTR-1 and the transaction was subsequently cancelled without completion of export formalities, issuance and reporting of a Credit Note would be the more appropriate and defensible approach rather than amendment of the export invoice. However, if the invoice was reported due to a clerical error and no supply was ever intended, the possibility of correction through amendment may be examined based on the specific facts and GST portal functionality.