The deadline for filing the GSTR-3B return for the March 2026 tax period remains set for April 20, 2026, despite expectations of an extension due to significant issues with the GST portal. Chartered Accountant Deep Koradia reported that users faced slow login times and frequent disconnections while attempting to file. Taxpayers who miss this deadline can still submit their GSTR-3B returns but will face penalties of ₹50 per day for delays, or ₹20 per day for those with no tax liability. Additionally, interest at an 18% per annum rate will apply to any outstanding tax amounts. The GST portal has introduced changes in how tax liabilities are reported, requiring taxpayers to confirm their tax liability breakup before filing. Feedback from professionals regarding these changes is being acknowledged and addressed by the GST Network (GSTN).