07 Oct 2026 — TDS / TCS deposit • 10 Oct 2026 — GSTR-7 — GST TDS return • 10 Oct 2026 — GSTR-8 — GST TCS return • 11 Oct 2026 — GSTR-1 — Outward supplies (monthly) • 13 Oct 2026 — GSTR-1 — Quarterly (QRMP) • 13 Oct 2026 — GSTR-6 — ISD return • 13 Oct 2026 — IFF — Invoice Furnishing Facility (QRMP) • 15 Oct 2026 — ADT-1 — Auditor appointment (if AGM on 30 Sep) • 18 Oct 2026 — CMP-08 — Composition quarterly payment • 20 Oct 2026 — GSTR-3B — Monthly summary & tax payment • 22 Oct 2026 — GSTR-3B — QRMP Category I states • 24 Oct 2026 — GSTR-3B — QRMP Category II states • 25 Oct 2026 — ITC-04 — Job work (Apr–Sep 2026) • 25 Oct 2026 — PMT-06 — QRMP monthly tax payment • 27 Oct 2026 — CRA-4 — File cost audit report with Central Government • 30 Oct 2026 — AOC-4 / AOC-4 XBRL / AOC-4 CFS • 30 Oct 2026 — LLP Form 8 — Statement of Account & Solvency • 30 Oct 2026 — AOC-4 XBRL — Financial statements (XBRL filers) • 30 Oct 2026 — AOC-4 CFS — Consolidated financial statements • 30 Oct 2026 — CSR-2 — Corporate Social Responsibility report • 30 Oct 2026 — NDH-3 — Nidhi half-yearly return (Apr–Sep 2026) • 31 Oct 2026 — Form 3CEB — Transfer pricing report • 31 Oct 2026 — ITR — tax audit cases • 31 Oct 2026 — TDS / TCS quarterly return — Q2 FY 2026-27 • 31 Oct 2026 — MSME-1 — Half yearly (Apr–Sep 2026) •

07 Oct 2026 — TDS / TCS deposit • 10 Oct 2026 — GSTR-7 — GST TDS return • 10 Oct 2026 — GSTR-8 — GST TCS return • 11 Oct 2026 — GSTR-1 — Outward supplies (monthly) • 13 Oct 2026 — GSTR-1 — Quarterly (QRMP) • 13 Oct 2026 — GSTR-6 — ISD return • 13 Oct 2026 — IFF — Invoice Furnishing Facility (QRMP) • 15 Oct 2026 — ADT-1 — Auditor appointment (if AGM on 30 Sep) • 18 Oct 2026 — CMP-08 — Composition quarterly payment • 20 Oct 2026 — GSTR-3B — Monthly summary & tax payment • 22 Oct 2026 — GSTR-3B — QRMP Category I states • 24 Oct 2026 — GSTR-3B — QRMP Category II states • 25 Oct 2026 — ITC-04 — Job work (Apr–Sep 2026) • 25 Oct 2026 — PMT-06 — QRMP monthly tax payment • 27 Oct 2026 — CRA-4 — File cost audit report with Central Government • 30 Oct 2026 — AOC-4 / AOC-4 XBRL / AOC-4 CFS • 30 Oct 2026 — LLP Form 8 — Statement of Account & Solvency • 30 Oct 2026 — AOC-4 XBRL — Financial statements (XBRL filers) • 30 Oct 2026 — AOC-4 CFS — Consolidated financial statements • 30 Oct 2026 — CSR-2 — Corporate Social Responsibility report • 30 Oct 2026 — NDH-3 — Nidhi half-yearly return (Apr–Sep 2026) • 31 Oct 2026 — Form 3CEB — Transfer pricing report • 31 Oct 2026 — ITR — tax audit cases • 31 Oct 2026 — TDS / TCS quarterly return — Q2 FY 2026-27 • 31 Oct 2026 — MSME-1 — Half yearly (Apr–Sep 2026) •