07 Dec 25 Payment of TDS/TCS of November. 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 Dec 25 Return of External Commercial Borrowings for November.

10 Dec 25 Monthly Return by Tax Deductors for November.

10 Dec 25 Monthly Return by e-commerce operators for November.

10 Dec 25 Furnishing of particulars for claiming relief u/s 89 (if assessee is required to submit return of income by October 31, 2025)

10 Dec 25 Filing of Income Tax returns by Cos, Partnership firms etc. (Audit applicable)

10 Dec 25 Furnishing of particulars for claiming relief u/s 89 (if assessee is required to submit return of income by October 31, 2025)

10 Dec 25 Filing of Income Tax returns by Cos, Partnership firms etc. (Audit applicable)

10 Dec 25 Online Application by Domestic Co. (other than to whom transfer pricing provisions are applicable) for exercise of option u/s 115BAA (22% tax)

10 Dec 25 Online Application by new Manufacturing Domestic Co. (other than to whom transfer pricing provisions are applicable) filing ITR for first time, for exercise of option u/s 115BAB (15% tax).

10 Dec 25 Online Application by Individual/HUF carrying business / profession, for exercise of option u/s 115BAC(1), where due date of ITR is 31 Oct.

10 Dec 25 Online Application by resident co-operative society, for exercise of option u/s 115BAD(1) where due date of ITR is 31 Oct.

11 Dec 25 Monthly Return of Outward Supplies for November.

13 Dec 25 Optional Upload of B2B invoices, Dr/Cr notes for November under QRMP scheme.

13 Dec 25 Monthly Return by Non-resident taxable person for November.

13 Dec 25 Monthly Return of Input Service Distributor for November.

15 Dec 25 Issue of TDS Certificate u/s 194-IA for TDS deducted on Purchase of Property in October.

15 Dec 25 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 October.

15 Dec 25 Issue of TDS Certificate for tax deducted u/s 194M on certain payments by individual/HUF in October.

15 Dec 25 Issue of TDS Certificate for tax deducted u/s 194S on Virtual Digital Assets in October.

15 Dec 25 E-Payment of PF for November.

15 Dec 25 Payment of ESI for November

15 Dec 25 Deposit of Third Instalment of Advance Tax (75%) by all assessees (other than 44AD & 44ADA cases).

15 Dec 25 Details of Deposit of TDS/TCS of November by book entry by an office of the Government.

20 Dec 25 Monthly Return by persons outside India providing online information and data base access or retrieval services, for November. Also to be filed by every registered person providing online money gaming from a place outside India to a person in India.

20 Dec 25 Add/amend particulars (other than GSTIN) in GSTR-1 of November. It can be filed after filing of GSTR-1 but before filing corresponding GSTR-3B.

20 Dec 25 Summary Return cum Payment of Tax for November by Monthly filers. (other than QRMP).

25 Dec 25 Deposit of GST under QRMP scheme for November .

28 Dec 25 Return for November by persons with Unique Identification Number (UIN) like embassies etc to get refund under GST for goods and services purchased by them.

31 Dec 25 Annual Return by OPCs and Small Companies.

31 Dec 25 Annual Return by companies other than OPCs and small companies.

31 Dec 25 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)

31 Dec 25 Filing of financial statements by Cos (Other than OPCs) for FY 2024-25 with the ROC. (30 days from AGM.)