Hello, useramayberr.
I'm here to help you add another bank in QuickBooks Online.
In QuickBooks Online, you can add a bank by going to your Chart of Accounts. You don't actually "change" a bank. The program lets you use multiple bank accounts for your transactions.
To add a new bank account:
- Go to Accounting, then choose the Chart of Accounts tab.
- Click the New button.
- Under Account Type, select Bank.
- Choose the Detail Type for it.
- Add an opening balance then enter a name for it.
- Once done, click Save and close.


You can use the new bank account to deposit your payments or creating expenses.
You also have the option to connect a live bank feed to the new account. This article can guide you through the process: Connect bank and credit card accounts to QuickBooks Online.
After connecting your bank account, you can start categorizing those transactions. Afterwards, you also have the option to do your regular reconciliation process. If you need help with the workflow, you can check this article: Reconcile an account in QuickBooks Online.
I'll offer some guides and steps again if you have more questions for QuickBooks Online. Add the details to your reply and I'll get back to you as soon as possible.