18 April 2026
If old GSTR-4 returns are beyond 3 years from due date, they are barred by section 39(11) and normally cannot be filed now. Since portal filing works in sequence, current year may also get blocked. At present, remedy is mainly to approach jurisdictional officer / raise GST grievance and watch for any government notification permitting belated filing under the proviso to section 39(11). If any later year is still within limitation, file that immediately.