If the initial ITR is not filed by the last date of filing returns, it is still possible to file a belated return. You can request an extension. It is also specified by the income tax department when the overdue tax return must be submitted. Considering the difficulties faced by taxpayers due to the COVID situation in the country, as well as several technical glitches with the new income tax portal, the government has extended the due date to file belated IT returns for AY 2021-22 from December 31, 2021, to March 15, 2022.