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.
Consequences of filing a revised return
There are no specific consequences of filling a revised return , however a revised tax return may increase the chances of tax return being picked up for a detailed scrutiny assessment. Once a revised ITR is filed, the original or the previous return is deemed to be withdrawn. 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.