#Due Dates

A 2026 reference for every GST return — GSTR-1, GSTR-3B, CMP-08, GSTR-4, GSTR-9, GSTR-9C and the rest. Who files each form, frequency, due dates from primary sources, QRMP Cat A vs Cat B states, and the FY 2024-25 changes that materially shifted the calendar.