Note: Dates are statutory due dates as on , including CBDT’s extension of the tax audit report (to 21 Oct 2026) and audit-case ITR (to 21 Nov 2026) for AY 2026-27. From 1 April 2026 the Income-tax Act, 2025 and Income-tax Rules, 2026 apply – TDS/TCS returns are Forms 138/140/144/143; FY 2025-26 compliances continue under the 1961 Act. If a due date falls on a holiday, check the portal for any relaxation. DIR-3 KYC is now required once every three financial years (next cycle: by 30 June 2028) or within 30 days of a change in contact details. This calendar is for general information; please verify against the latest notifications before acting.