Economy COVID-19: Deadlines for filing GST returns extended Updated : March 23, 2020 06:13 PM IST The due date for filing return in FORM GSTR-3B for February by all registered persons has been extended to April 7, 2020. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.