Important dates in March 2026 for compliance under the Goods and Services Tax (GST).
| Due Dates | GSTR Form/Description | Period |
| 10.04.2026 | GSTR – 7: Summary of Tax Deducted at Source (TDS) and deposited under GST laws | March 2026 |
| 10.04.2026 | GSTR – 8: Summary of Tax Collected at Source (TCS) and deposited by e-commerce operators under GST laws | March 2026 |
| 11.04.2026 | GSTR – 1: GST Filing of monthly Statement of Outward Supplies by a registered person with aggregate turnover exceeding INR 5 Crores during the preceding financial year or any registered person has opted to file a monthly return. | March 2026 |
| 13.04.2026 | GSTR – 1 IFF: Details of B2B Supply of a registered person with turnover less than INR 5 Crores during the preceding year and who has opted for quarterly filing of return under QRMP. | January – March 2026 |
| 13.04.2026 | GSTR – 6: Details of Input Tax Credit (ITC) received and distributed by an Input Service Distributors (ISD). | March 2026 |
| 13.04.2026 | GSTR – 5: Summary of outward taxable supplies and tax payable by a non-resident taxable person. | March 2026 |
| 18.04.2026 | CMP–08: Quarterly challan-cum-statement to be furnished by composition taxpayers. | January – March 2026 |
| 20.04.2026 | GSTR – 5A: Summary of outward taxable supplies and tax payable by a person supplying OIDAR services. | March 2026 |
| 20.04.2026 | GSTR – 3B: GST Filing of returns by a registered person with aggregate turnover exceeding INR 5 Crores during the preceding financial year. | March 2026 |
| 22.04.2026 | GSTR – 3B: Summary of outward supplies, ITC claimed, and net tax payable by taxpayers who have opted for the QRMP scheme and registered in category X states or UTs* | January – March 2026 |
| 24.04.2026 | GSTR – 3B: Summary of outward supplies, ITC claimed, and net tax payable by taxpayers who have opted for the ORMP scheme and registered in category Y states or UTs** | January – March 2026 |
| 25.04.2026 | ITC-04: Details of goods/capital goods sent to job workers and received back, the principal whose aggregate turnover during the immediately preceding financial year exceeded five crore rupees | October 2025 – March 2026 |
| 28.04.2026 | GSTR – 11: Statement of inward supplies received by persons having Unique Identification Number (UIN) | March 2026 |
| 30.04.2026 | QRMP: Taxpayers having Turnover below Rs 5 Crores shall have an option to select the frequency of GST return (QRMP) filing for FY 2026-27. | Financial Year 2026-27 |
| * Category X States – Chhattisgarh, MP, Gujarat, Maharashtra, Karnataka, Goa, Kerala, Tamil Nadu, Telangana, Andhra Pradesh, Puducherry, Daman and Diu and Dadra and Nagar haveli, Andaman and Nicobar islands, Lakshadweep.
** Category Y States – HP, Punjab, Uttarakhand, Haryana, Uttar Pradesh, Rajasthan, Bihar, Sikkim, Arunachal Pradesh, Nagaland, Manipur, Mizoram, Tripura, Meghalaya, Assam, West Bengal, Jharkhand, Odisha, Jammu and Kashmir, Ladakh, Chandigarh, Delhi. |
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