Revision In GSTR 1

If you've submitted your GSTR 1 but realised some sales invoices were missed, you generally cannot revise the submitted return directly. The advice given is to file the missed invoices in the next month's GSTR 1, though this may incur interest. It's recommended to contact the GST Help Desk for confirmation. Showing the correct sales in GSTR 3B can lead to mismatches and potential notices from tax authorities.