Updated return of income must be filed electronically, using digital signature or an electronic verification code as prescribed. Rule 12AC requires eligible taxpayers to file an updated return in Form ITR-U for assessment years beginning on or after April 1, 2020. Taxpayers subject to audit under section 44AB, companies, and political parties must file electronically under digital signature; other eligible taxpayers may file either under digital signature or by transmitting data electronically using an electronic verification code. The Principal Director General or Director General of Income-tax (Systems) shall specify procedures, formats, standards and security, archival and retrieval policies for such electronic filing.