28 Mar 26 Return by persons with Unique Identification Number (UIN) like embassies etc to get refund under GST for goods and services purchased by them, for February .

30 Mar 26 Deposit of TDS on payment made for purchase of property in February.

30 Mar 26 Deposit of TDS u/s 194-IB @ 5% on total payment of Rent more than 50,000 pm by individual or HUF (not liable to tax audit) during FY 25-26 where lease has terminated in February (Else TDS is to be deposited on annual basis by 30 April of next year.)

30 Mar 26 Deposit of TDS u/s 194M for February.

30 Mar 26 Deposit of TDS on Virtual Digital Assets u/s 194S for February.

31 Mar 26 Complete CPE Hours for Calendar year 2025. Update Unstructured CPE hours details like reading of ICAI journal at https://cpeapp.icai.org.

31 Mar 26 Opt for Composition scheme for FY 2026-27. Existing ones are not required to apply again.

31 Mar 26 Online Application for Letter of Undertaking (LUT) for Exports & Supplies to SEZ without payment of tax in FY 2026-27.

31 Mar 26 For FY 26-27, GTA can change from Forward Charge mechanism to RCM or vice-versa by e-filing necessary declaration.

31 Mar 26 Calculation of Aggregate Turnover of F.Y. 25-26 for various compliances related to F.Y. 26-27 like for QRMP scheme, Composition scheme, E-invoice applicability etc.

31 Mar 26 Payment of balance Advance Income Tax by ALL to save interest u/s 234B.

31 Mar 26 Payment of life insurance premium, deposit of PPF etc. for saving tax of FY 25-26 under old regime.

31 Mar 26 Uploading of Statement of foreign income offered to tax and tax deducted or paid on such income in previous year 2024-25, to claim foreign tax credit if ITR furnished within the time specified under section 139(1) or section 139(4).

31 Mar 26 Pay Outstanding dues of Micro & Small Enterprises of FY 25-26 to avoid disallowance u/s 43B. No Relief of payment till due date of ITR.

31 Mar 26 Updated ITR for AY 2023-24 with 50% of aggregate tax and interest payable.

31 Mar 26 Updated ITR for AY 2024-25 with 25% of aggregate tax and interest payable.

31 Mar 26 "File Correction statements of FY 2018-19: Quarter 4 only, FY 2019-20 to FY 2022-23: All quarters and FY 2023-24: Quarters 1 to 3."

31 Mar 26 Complete CPE Hours for Calendar year 2025. Update Unstructured CPE hours details like reading of ICAI journal at https://cpeapp.icai.org.

31 Mar 26 Quarter 4 – Board Meeting of All Companies