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TurboGST

RET291107: Invoice number already exists in GSTR-1

An invoice with this number is already in the return.

Why it happens

  • Re-upload of an already uploaded invoice.
  • Two invoices share one number.

How to fix it

  1. Skip it if unchanged; otherwise change the number (only if the invoice itself was re-issued) or delete the old record on the portal.

Last checked 17 October 2026

Based on public write-ups of this portal error, not on GSTN's own documentation. If the portal's message differs from what's described here, trust the portal and ask your CA.