| 07/10/2025 | Income Tax | Challan No. ITNS-281 | Payment of TDS/TCS of September.
In case of government offices where TDS/TCS is paid by book entry, same shall be paid on the same day on which tax is deducted or collected. |
| 07/10/2025 | Income Tax | Form 27C | Seller to upload declarations received inSep, from buyers for non-deduction of TCS. |
| 07/10/2025 | FEMA | ECB-2 | Return of External Commercial Borrowings for September. |
| 10/10/2025 | ICAI Act | MEF Form | CA firms to Submit online Multi purpose Empanelment form (MEF) for FY 25-26. |
| 10/10/2025 | Goods and Services Tax | GSTR-7 | Monthly Return by Tax Deductors for September. |
| 10/10/2025 | Goods and Services Tax | GSTR-8 | Monthly Return by e-commerce operators for September. |
| 11/10/2025 | Goods and Services Tax | GSTR-1 | Monthly Return of Outward Supplies for September. |
| 13/10/2025 | Goods and Services Tax | GSTR-1 | Quarterly Return of Outward Supplies for Jul-Sep (QRMP) |
| 13/10/2025 | Goods and Services Tax | GSTR-5 | Monthly Return by Non-resident taxable person for September. |
| 13/10/2025 | Goods and Services Tax | GSTR-6 | Monthly Return of Input Service Distributor for September. |
| 14/10/2025 | Companies Act | Form ADT-1 | Notice for the appointment of Auditor if AGM date was 30 Sep (within 15 days of AGM) |
| 15/10/2025 | ESI | ESI Challan | Payment of ESI for September |
| 15/10/2025 | Provident Fund | Electronic Challan cum Return (ECR) | E-Payment of PF for September. |
| 15/10/2025 | Income Tax | 27EQ | TCS Statement for Sep Quarter. |
| 15/10/2025 | Income Tax | Form 24G | Details of Deposit of TDS/TCS of September by book entry by an office of the Government. |
| 15/10/2025 | Income Tax | Form No.15CC | Statement by Banks etc. in respect of foreign remittances in Sep Quarter. |
| 15/10/2025 | Income Tax | Form No.15G/H | E-filing of form 15G/H for Sep Quarter. |
| 15/10/2025 | Income Tax | Form 16B | Issue of TDS Certificate u/s 194-IA for TDS deducted on Purchase of Property in August. |
| 15/10/2025 | Income Tax | Form 16C | Issue of TDS Certificate for tax deducted on rent above 50,000 pm by certain individuals/HUF under Section 194-IB where lease has terminated in August. |
| 15/10/2025 | Income Tax | Form 16D | Issue of TDS Certificate for tax deducted u/s 194M on certain payments by individual/HUF in August. |
| 15/10/2025 | Income Tax | Form 16E | Issue of TDS Certificate for tax deducted u/s 194S on Virtual Digital Assets in August. |
| 15/10/2025 | Companies Act | DIR-3 | KYC of All Directors (individuals) who hold DIN on 31st March, 2025. |
| 18/10/2025 | Goods and Services Tax | CMP-08 | Payment of tax of Jul-Sep quarter for taxpayers under Composition Scheme. |
| 20/10/2025 | Goods and Services Tax | GSTR-5A | Monthly Return by persons outside India providing online information and data base access or retrieval services, for September. |
| 25/10/2025 | Goods and Services Tax | GSTR-1A | To add/amend particulars (other than GSTIN) in GSTR-1 of Sep. It can be filed after filing of GSTR-1 but before filing corresponding GSTR-3B. |
| 25/10/2025 | Goods and Services Tax | GSTR-3B | Summary Return cum Payment of Tax for September by Monthly filers. (other than QRMP). |
| 25/10/2025 | Goods and Services Tax | GSTR-1A | Add/amend particulars (other than GSTIN) in GSTR-1 of Sep quarter by Quarterly filers in Chhattisgarh, Madhya Pradesh, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh, the Union territories of Daman and Diu and Dadra and Nagar Haveli, Puducherry, Andaman and Nicobar Islands or Lakshadweep. It can be filed after filing of GSTR-1 but before filing corresponding GSTR-3B. |
| 25/10/2025 | Goods and Services Tax | GSTR-3B | Summary Return of Jul-Sep quarter by Quarterly filers in Chhattisgarh, Madhya Pradesh, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh, the Union territories of Daman and Diu and Dadra and Nagar Haveli, Puducherry, Andaman and Nicobar Islands or Lakshadweep. |
| 25/10/2025 | Goods and Services Tax | GSTR-1A | Add/amend particulars (other than GSTIN) in GSTR-1 of Sep quarter by Quarterly filers in Himachal Pradesh, Punjab, Uttarakhand, Haryana, Rajasthan, Uttar Pradesh, Bihar, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam, West Bengal, Jharkhand or Odisha, the Union territories of Jammu and Kashmir, Ladakh,Chandigarh or Delhi. It can be filed after filing of GSTR-1 but before filing corresponding GSTR-3B. |
| 25/10/2025 | Goods and Services Tax | GSTR-3B | Summary Return of Jul-Sep quarter by Quarterly filers in Himachal Pradesh, Punjab, Uttarakhand, Haryana, Rajasthan, Uttar Pradesh, Bihar, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam, West Bengal, Jharkhand or Odisha, the Union territories of Jammu and Kashmir, Ladakh,Chandigarh or Delhi. |
| 25/10/2025 | Goods and Services Tax | ITC-04 | Half yearly Details of goods/capital goods sent to & from job worker for Apr-Sep for turnover above 5 cr. |
| 26/10/2025 | Companies Act | Form CRA-4 | Filing of Cost Audit Report for 2024-25 by Company to whom cost audit is applicable. (within 30 days of submission by Cost Auditor report) |