In one case, self assessment tax was paid and ITR-1 form filled up and submitted electronically on 31st July, 2012. Later it was realized that some amount was forgotten while calculating income tax and extra self assessment tax is yet to be paid. Can this be done now? In this case, if the dept accepts the revised return. should the person send two ITR-V forms (the first one, though incorrect, should carry signature to validate the submission and the final one also for the same reason)? Thanks for suggestions.