Starting July 2025, the GSTN will make the GSTR-3B form non-editable to enhance consistency and reduce revenue leakages. Taxpayers must use GSTR-1A to amend outward supplies before filing GSTR-3B.

For those taxpayers who are filing GSTR-1 on a quarterly basis the new deadline is January 15, 2025. The deadline to file GSTR-3B has also been extended to January 22, 2025 for monthly GSTR-3B filers.