The concept of Updated Return was introduced by Budget 2022. Updated return can be filed with payment of additional tax within two year from the end of relevant assessment year.
31st March 2023 is the last date to file udpated return for FY 2019-20.
31st March 2024 is the last date to file udpated return for FY 2020-21.
31st March 2025 is the last date to file udpated return for FY 2021-22.
31st March 2026 is the last date to file udpated return for FY 2022-23.
Click below link for more detail:-
various due dates of Income tax for FY 21-22 (AY 22-23)
various due dates of Income tax for FY 22-23 (AY 23-24)
various due dates of Income tax for FY 23-24 (AY 24-25)