How can I add another bank account with the same bank to Quickbooks?

It's nice to see you here in the Community, @heidisskincarest.

Let me show you how to add another bank account in QuickBooks Online (QBO) by following the steps below:

1. On the left pane, navigate to the Accounting tab and select the Chart of Accounts.
2. At the top right, click New.
3. Select an Account Type, Detail Type, and Beginning Balance.
4. Enter the name differently by adding another character to set it apart from the first bank account. 
5. Select Save and close once finished.

Doing this will add a bank account to your Chart of Accounts for holding manually created transactions without a live connection. 

For additional information, I've attached articles you can use to connect a bank account to QBO, manage the downloaded transactions, and set up sub-accounts: 

• Online Banking

• Manually upload transactions

• Set up the parent and subaccounts

Drop by again, if you have other questions or clarifications. Wishing you and your business success.