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| Due date | Category | What to file / pay | Form |
|---|---|---|---|
| 07 Oct 2026 (Wed) | TDS | Deposit TDS/TCS deducted in Sep 2026 | Challan (new 4-digit payment codes) |
| 10 Oct 2026 (Sat) | Professional tax | Telangana Professional Tax: Form V return + payment for Sep 2026 salaries | Form V |
| 11 Oct 2026 (Sun) | GST | GSTR-1 (monthly filers) for Sep 2026 | GSTR-1 |
| 13 Oct 2026 (Tue) | GST | GSTR-1 quarterly (QRMP) for Jul-Sep 2026 | GSTR-1 |
| 15 Oct 2026 (Thu) | Company / MSME | ADT-1 auditor appointment (if AGM held 30 Sep 2026) | ADT-1 |
| 15 Oct 2026 (Thu) | Payroll | PF (ECR) and ESI contributions for Sep 2026 wages | ECR / ESI challan |
| 18 Oct 2026 (Sun) | GST | CMP-08 composition tax statement for Jul-Sep 2026 | CMP-08 |
| 20 Oct 2026 (Tue) | GST | GSTR-3B (monthly filers) for Sep 2026 | GSTR-3B |
| 21 Oct 2026 (Wed) | Income tax | Tax audit report (Form 3CA/3CB with 3CD) and other audit reports tied to the s.44AB "specified date", AY 2026-27 (FY 2025-26), extended from 30 Sep 2026 by CBDT Circular 07/2026 | Tax audit report |
| 22 Oct 2026 (Thu) | GST | GSTR-3B quarterly (QRMP, Telangana = 22nd group) for Jul-Sep 2026 | GSTR-3B |
| 30 Oct 2026 (Fri) | Company / MSME | AOC-4 financial statements (if AGM held 30 Sep 2026) | AOC-4 |
| 31 Oct 2026 (Sat) | Company / MSME | MSME-1 half-yearly return (Apr-Sep 2026) of dues to micro/small suppliers unpaid > 45 days | MSME-1 |
| 31 Oct 2026 (Sat) | Income tax | Transfer-pricing report (Form 3CEB) and audit reports of TP cases, AY 2026-27 (FY 2025-26) (NOT extended by Circular 07/2026) | TP report |
| 31 Oct 2026 (Sat) | TDS | Quarterly TDS/TCS statements for Jul-Sep 2026 | Form 138 (salary, was 24Q) / 140 (was 26Q) / 144 (was 27Q) / 143 TCS (was 27EQ) |
| 07 Nov 2026 (Sat) | TDS | Deposit TDS/TCS deducted in Oct 2026 | Challan (new 4-digit payment codes) |
| 10 Nov 2026 (Tue) | Professional tax | Telangana Professional Tax: Form V return + payment for Oct 2026 salaries | Form V |
| 11 Nov 2026 (Wed) | GST | GSTR-1 (monthly filers) for Oct 2026 | GSTR-1 |
| 13 Nov 2026 (Fri) | GST | IFF (optional invoice upload, QRMP) for Oct 2026 | IFF |
| 15 Nov 2026 (Sun) | Payroll | PF (ECR) and ESI contributions for Oct 2026 wages | ECR / ESI challan |
| 15 Nov 2026 (Sun) | TDS | Issue TDS certificates (non-salary) for Jul-Sep 2026 | Form 131 (was 16A) |
| 20 Nov 2026 (Fri) | GST | GSTR-3B (monthly filers) for Oct 2026 | GSTR-3B |
| 21 Nov 2026 (Sat) | Income tax | Income-tax return for audit cases, AY 2026-27 (FY 2025-26), extended from 31 Oct 2026 by CBDT Circular 07/2026 | ITR |
| 25 Nov 2026 (Wed) | GST | PMT-06 monthly tax payment (QRMP) for Oct 2026 | PMT-06 |
| 29 Nov 2026 (Sun) | Company / MSME | MGT-7 / MGT-7A annual return (if AGM held 30 Sep 2026) | MGT-7 / 7A |
| 30 Nov 2026 (Mon) | Income tax | ITR for transfer-pricing (s.92E) cases, AY 2026-27 (FY 2025-26) | ITR |
| 07 Dec 2026 (Mon) | TDS | Deposit TDS/TCS deducted in Nov 2026 | Challan (new 4-digit payment codes) |
| 10 Dec 2026 (Thu) | Professional tax | Telangana Professional Tax: Form V return + payment for Nov 2026 salaries | Form V |
| 11 Dec 2026 (Fri) | GST | GSTR-1 (monthly filers) for Nov 2026 | GSTR-1 |
| 13 Dec 2026 (Sun) | GST | IFF (optional invoice upload, QRMP) for Nov 2026 | IFF |
| 15 Dec 2026 (Tue) | Income tax | Advance tax: 3rd instalment (75% cumulative) for tax year 2026-27 | Challan |
| 15 Dec 2026 (Tue) | Payroll | PF (ECR) and ESI contributions for Nov 2026 wages | ECR / ESI challan |
| 20 Dec 2026 (Sun) | GST | GSTR-3B (monthly filers) for Nov 2026 | GSTR-3B |
| 25 Dec 2026 (Fri) | GST | PMT-06 monthly tax payment (QRMP) for Nov 2026 | PMT-06 |
| 31 Dec 2026 (Thu) | GST | GSTR-9 annual return (and GSTR-9C where applicable) for FY 2025-26 | GSTR-9 / 9C |
| 31 Dec 2026 (Thu) | Income tax | Belated ITR (s.139(4)) for AY 2026-27 (FY 2025-26): last date. Also the last date to revise a filed return WITHOUT the s.234-I fee | ITR |
| 07 Jan 2027 (Thu) | TDS | Deposit TDS/TCS deducted in Dec 2026 | Challan (new 4-digit payment codes) |
| 10 Jan 2027 (Sun) | Professional tax | Telangana Professional Tax: Form V return + payment for Dec 2026 salaries | Form V |
| 11 Jan 2027 (Mon) | GST | GSTR-1 (monthly filers) for Dec 2026 | GSTR-1 |
| 13 Jan 2027 (Wed) | GST | GSTR-1 quarterly (QRMP) for Oct-Dec 2026 | GSTR-1 |
| 15 Jan 2027 (Fri) | Payroll | PF (ECR) and ESI contributions for Dec 2026 wages | ECR / ESI challan |
| 18 Jan 2027 (Mon) | GST | CMP-08 composition tax statement for Oct-Dec 2026 | CMP-08 |
| 20 Jan 2027 (Wed) | GST | GSTR-3B (monthly filers) for Dec 2026 | GSTR-3B |
| 22 Jan 2027 (Fri) | GST | GSTR-3B quarterly (QRMP, Telangana = 22nd group) for Oct-Dec 2026 | GSTR-3B |
| 31 Jan 2027 (Sun) | TDS | Quarterly TDS/TCS statements for Oct-Dec 2026 | Form 138 / 140 / 144 / 143 |
| 07 Feb 2027 (Sun) | TDS | Deposit TDS/TCS deducted in Jan 2027 | Challan (new 4-digit payment codes) |
| 10 Feb 2027 (Wed) | Professional tax | Telangana Professional Tax: Form V return + payment for Jan 2027 salaries | Form V |
| 11 Feb 2027 (Thu) | GST | GSTR-1 (monthly filers) for Jan 2027 | GSTR-1 |
| 13 Feb 2027 (Sat) | GST | IFF (optional invoice upload, QRMP) for Jan 2027 | IFF |
| 15 Feb 2027 (Mon) | Payroll | PF (ECR) and ESI contributions for Jan 2027 wages | ECR / ESI challan |
| 15 Feb 2027 (Mon) | TDS | Issue TDS certificates (non-salary) for Oct-Dec 2026 | Form 131 |
| 20 Feb 2027 (Sat) | GST | GSTR-3B (monthly filers) for Jan 2027 | GSTR-3B |
| 25 Feb 2027 (Thu) | GST | PMT-06 monthly tax payment (QRMP) for Jan 2027 | PMT-06 |
| 07 Mar 2027 (Sun) | TDS | Deposit TDS/TCS deducted in Feb 2027 | Challan (new 4-digit payment codes) |
| 10 Mar 2027 (Wed) | Professional tax | Telangana Professional Tax: Form V return + payment for Feb 2027 salaries | Form V |
| 11 Mar 2027 (Thu) | GST | GSTR-1 (monthly filers) for Feb 2027 | GSTR-1 |
| 13 Mar 2027 (Sat) | GST | IFF (optional invoice upload, QRMP) for Feb 2027 | IFF |
| 15 Mar 2027 (Mon) | Income tax | Advance tax: 4th instalment (100% cumulative) for tax year 2026-27 | Challan |
| 15 Mar 2027 (Mon) | Payroll | PF (ECR) and ESI contributions for Feb 2027 wages | ECR / ESI challan |
| 20 Mar 2027 (Sat) | GST | GSTR-3B (monthly filers) for Feb 2027 | GSTR-3B |
| 25 Mar 2027 (Thu) | GST | PMT-06 monthly tax payment (QRMP) for Feb 2027 | PMT-06 |
| 31 Mar 2027 (Wed) | Income tax | Revised ITR (s.139(5)) for AY 2026-27 (FY 2025-26): last date, if assessment not completed earlier. Revisions after 31 Dec 2026 attract a fee under s.234-I (confirm amount with your CA) | ITR (revised) |