16 Digit Bank Account

There is no problem. Generally banks allots account no. to their clients in 10-16 digits but they have initial 2-4 digit common.

 Therefore you should ask to bank for common digits assign to account nos. and you may fill in IT forms remaining uncommon unique digits allotted to you by bank.

Have the banks notified those common digits which can be omitted while providing the account number to IT department?

Let the banks notify such changes for the benefit of the account holders.

Dear Mr. S. Kumar,

 I think banks already notified the common digits of account nos. to the accounts holders for submitting the same to the authorities

Dear Mr. Amit,

May I request you to share the information which the banks have notified to their account holders?

This will help resolve the technical difficulty in entering 16 digit Bank Account numbers in IT Return.