You can always find your BSB and account number in internet banking, under the name of each account in the 'home' screen and in the 'view accounts' screen. The first six digits are your BSB number, and the remaining ones are your account number.
To find your BSB number in the app, tap the account you need then tap the 'details' tab.
You can also find your BSB and account number on the front page of your account statements.
Credit cards
Note that credit cards don’t have a BSB number. If you’re looking to pay off your credit card, use the BPAY details on your credit card statement.