Taxpayers are usually careful and exercise due diligence while filing income tax (I-T) returns. But sometimes in a rush to file their tax returns within the due date, they end up making mistakes. Some of the common mistakes while filing the (I-T) returns are unclaimed deductions or an income not reported or reported incorrectly. One’s contact details or the bank account given for the refund of taxes could also be wrong. However, if you have filed your return within the due date, then you need not worry as you can revise your return.