Have multiple bank accounts how should you report interest received?

You can ask for an interest paid-out statement from each of the banks where you have accounts. At the end of the year when you file your taxes, you can consolidate all these statements and then sum up the total interest you received from all the accounts put together. This total sum must be considered an "Income from other sources" and should be clubbed up with your total annual income for taxation purposes.

For ex: If you received Rs. 5000 from bank A, Rs. 4000 from bank B and Rs. 6000 from bank C your total interest income is Rs. 15,000/-. If your annual income was Rs. 4,50,000/-, the total income including the interest income will be Rs. 4,65,000/-