You can generally revise your Income Tax Return within one year from the end of the relevant Financial Year, or before the assessment is completed, whichever comes first. For example, returns for the financial year 2018-19 could be revised up to 30 June 2020, even if an intimation under section 143(1) had already been received.
08 June 2020
An Income Tax Return can be revised within 1 year from the end of the relevant Financial Year or before the assessment is complete whichever is earlier.