Learn how to file an Updated Return (ITR-U) to correct errors or report additional income in your previously filed returns. Find out the eligibility, process, penalties, legal aspects, examples, and FAQs of ITR-U. ITR-U or Updated Income Tax Return is the form that allows you to rectify errors or omissions and update your previous ITR. It can be filed within four years from the end of the relevant assessment year. Learn about the updated income tax form ITR-U and how it can help correct errors, reduce losses, and claim tax credits. The income tax department notifies Form ITR U for filing the ‘Updated’ income tax return. This allows the taxpayers to update their ITRs within four years of filing, on payment of additional taxes, in case of errors or omissions.