Taxpayers have until December 31, 2025, to file a revised Income Tax Return for the 2024-25 financial year, provided the assessment is not completed earlier. This revision, permitted under Section 139(5) of the Income-tax Act, allows correction of errors or omissions in the original filing, replacing it as the valid return. However, revised returns cannot be filed if the original return was belated; in such cases, an updated return under Section 139(8A) may be an option.