What is the bank access code in Australian? Is it the BSB? Or something else?

I can help you connect your bank account in QuickBooks, Editorialeyes.

Yes, the Bank State Branch (often referred to as "BSB") is the name used in Australia for a bank code, which is a branch identifier. The BSB is normally used in association with the account number system used by each financial institution. You can enter the six-digit bank code when asked in connecting your bank. 

You can check out these links on how to manage connected bank accounts and transaction:

• Connect bank and credit card accounts to QuickBooks Online
• Categorise and match online bank transactions in QuickBooks Online 

Keep me posted if there's anything else that you need help with. Take care!