18 Apr 26 Payment of GST by Composition taxpayers for January-March .

20 Apr 26 Monthly Return by persons outside India providing online information and data base access or retrieval services, for March.

20 Apr 26 Add/amend particulars (other than GSTIN) in GSTR-1 of March. It can be filed after filing of GSTR-1 but before filing corresponding GSTR-3B.

20 Apr 26 Summary Return cum Payment of Tax for March by Monthly filers. (other than QRMP).

22 Apr 26 Add/amend particulars (other than GSTIN) in GSTR-1 of Mar 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.

22 Apr 26 Summary Return of January-March 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 Apr 26 Half yearly Details of goods/capital goods sent to & from job worker for October -March for turnover above 5 cr.

25 Apr 26 Yearly Details of goods/capital goods sent to & from job worker for April-March for turnover upto 5 cr.

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

30 Apr 26 Taxpayers with Turnover upto Rs 5 Crores in 2025-26 can opt in or opt out of QRMP Scheme from April-June quarter. Those already availing the scheme not required to reapply.

30 Apr 26 Payment of TDS deducted in March (both Salary & non-salary)

30 Apr 26 Details of Deposit of TDS/TCS of March by book entry by an office of the Government.

30 Apr 26 Deposit of TDS u/s 194-IA on payment made for purchase of property in March.

30 Apr 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 23-24. (In case of termination of lease during the year, TDS is to be deposited within 30 days of the next month).

30 Apr 26 Deposit of TDS on certain payments made by individual/HUF u/s 194M for March.

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

30 Apr 26 Uploading declarations received in Form 15G/15H for Mar quarter.

30 Apr 26 e-filing of declarations containing particulars of Form 60 received during October - March.

30 Apr 26 Half yearly Statement of Financial Transactions by Depositories, Registrars & Share Transfer Agents for reporting of information relating to Capital gains on transfer of listed securities or units of Mutual Funds from Oct -Mar.

30 Apr 26 Disclosure of dues of more than 45 days to MSME Suppliers by companies from Oct to Mar.

30 Apr 26 Opening of Bank Account for Un-spent CSR Account and transfer of unspent CSR amount to that account (For Cos to whom CSR is applicable)

30 Apr 26 Annual Return of Dormant Company for FY 2025-26.