As per provisions of Section 139(5) of the Income Tax Act, 1961, it provides that returns can be revised in the following situations:-
To correct the errors, that taken place in earlier return and To include the detail that missed out providing earlier.
The below mentioned are the some examples for which return can be revised and rectify:-
To correct personal or bank details;
To correct the income mismatch with 26AS Form;
To correct ITR Form, in which return filled and
To include the income that missed to disclosed;
To claim the benefit of TDS or Advance Tax paid, if forget earlier;
Although there is no restriction as per law for the number of times for which return can be revised but it must be within the period provided for revision.
And provision of Income Tax Act, 1961 provides that return can be revised from the AY i.e. 2018-19 up to the end of AY or completion of assessment by AO, whichever is earlier. In other words, return revision window will be available for AY 2018-19 up to 31st March, 2019 or before the assessment happens, whichever is earlier.