If the bank account is not pre-validated. It is now required to pre-validate your bank account. 2. The name on the bank account does not match the PAN card data. 3. In the event of an incorrect IFSC code. 4. If the account you referenced in the ITR has been closed.
In the case of employed people, many times the new tax regime is selected by mistake and the employee is not able to get any benefit from HRA to other investments. Even in such cases, more tax is deducted.