How to combine 2 bank accounts into one in QB

It's good to see you here again in the Community.

Let's change the Account name (Name) and Tax form section (Detail Type) of the duplicate account's info to exactly match the one you want to keep so you can combine them into one and keep your list organized in QuickBooks Online (QBO).

Before doing so, please note that combining (merging) two bank accounts into one is permanent. Then, undoing this isn't an option. QuickBooks uses some accounts as the default for certain features. These, like accounts connected to online banking, can't be merged or deleted.

Whenever you're ready, follow these steps: 

1. Go to the Accounting menu and select Chart of accounts.
2. Look for the account you want to keep. Click the drop-down arrow next to View register and select Edit.
3. Take note of the account details and click Cancel.
4. Find the account you want to merge. Then, click the drop-down arrow next to View register and select Edit.
5. Change the Account name (Name) and Tax form section (Detail Type) to match the account you want to keep.
6. Choose Yes to confirm the merging process.

If you wish to know more about merging accounts in QBO, please see this article: Merge duplicate accounts, customers, and vendors in QuickBooks Online. It also includes steps on how you can combine your customers' and vendors' profiles.

In case one of your bank accounts is connected to online banking, you'll first have to disconnect it before you combine or merge it to its duplicate. Then, reconnect your account to online banking if necessary. This way, you can download and categorize your transactions accordingly.

Also, I encourage you to reconcile your accounts in QBO regularly (every month). This helps monitor your income and expense transactions and detect possible errors accordingly. You may want to check out this article as your reference to guide you in doing and fixing reconciliations in QBO: Learn the reconcile workflow in QuickBooks.

Please feel free to leave a comment below if you have other banking concerns or questions about managing transactions in QBO. I'm always ready to help. Take care, and stay safe.