Minor errors made when filing income tax returns can render them invalid. These errors could be as simple as not choosing the right assessment year. Remember, you will be filing income tax returns for financial year 2021-22 and, thus, assessment year 2022-23. Double-check your bank account details. Entering incorrect details could lead to a delay in getting your tax refund. Also, if you have switched jobs during 2021-22, do not forget to declare the salary paid by your previous employer in your ITR.