My bank account is not showing how can i add it

Hi, @steinmann65-btin.

You can add your bank account from the Chart of Accounts window. I'll guide you how.

1. Open your QuickBooks Online account, then click on Accounting at the left pane.
2. Select Chart of Accounts.
3. Hit on the New tab.
4. Input the account details, then click on Save and Close.

On the other hand, if you want to connect your account to open banking, you can check out this article as your guide: Connect your bank feeds using Open Banking.

Moreover, here's how you can categorise and match your banking transactions in QuickBooks Online.

If you have any other questions about adding a bank account in QBO, please notify me by adding a comment below. I'm always here to help. Have a good one!