Tax filing mistakes often come to light only after a return is submitted, leading to refund delays, tax demands or compliance hassles. From unreported income to Form 26AS mismatches, here are five errors taxpayers should avoid while filing their ITR. Tax filing mistakes often come to light only after a return is submitted, leading to refund delays, tax demands or compliance hassles. From unreported income to Form 26AS mismatches, here are five errors taxpayers should avoid while filing their ITR. by Soban News (international And National News)