Opening bank balance

Yes, you are correct you have to take Bank balance, as per your Books ( financial statements ), however you have to do Bank reconciliation and find out the difference in your books and Bank statement. There are number of reasons given below for difference.

1) Cheque issued by you but not presented by party in the Bank

2) Cheque Deposited by you but not cleared by the Bank

3) Bank charges debited in Bank statement but not in your books

4) Interest received in Bank but not credited  in your books

5) Other reasons

So on and so forth, do the reconciliation after reconciliation your Bank Balances in Books and in Bank statement should Tally .

In Tally prime  Gateway  Tally /  Banking / Bank A/c  /  Bank reconciliation /  press F5 for reconciliation .