Credi note cancel in GSTR 1

If you've filed your GSTR 1 and realised you made an error with a credit note, there are ways to rectify it. You can amend the incorrect entry in the following month's GSTR 1 filing. Alternatively, you can issue a debit note to correct the mistake. For sales returns, consider raising a new invoice and including it in your current month's GSTR-3B, then add this invoice to your GSTR 1 in the subsequent month.