For the assessment year 2020-21, the last date to file your income tax returns without penalty is November 30. Moreover, anyone can refile an ITR if there has been a mistake or omission in the original tax return under Section 139(5) of the Income Tax Act, 1961. In this edition of the Explained series, find out how to e-file your return and the mistakes to avoid. Watch the video for more. | moneycontrol.com