The deadline to file GSTR 3B return is November 20, 2024, and the deadline for filing GSTR 1 was November 11, 2024. Both the returns can be filed till November 30, 2024, by paying the late fee.

In its advisory, GSTN explained that while GSTR-3B will still be auto-filled based on sales data from forms like GSTR-1, any changes or corrections must be made before filing, using form GSTR-1A.