I have a bank account balance where the register balance in the reconciliation is showing a balance that is different than the balance in the chart of account. ? to fix

Thanks for posting in the Community forum, hbata1.

There are several factors why bank register balance in QuickBooks Online (QBO) doesn’t match your actual bank balance. These are due to the following:

• Outstanding transactions.
• New transactions for a connected account. 
• Duplicate transactions. 
• Edited or deleted transactions. 
• Credit card (liability) account. 

To isolate the issue, I recommend reviewing your beginning balance. Since to reconcile your account accurately, the beginning balance in QBO should match the beginning balance on your bank statement. You can take a look at these articles for the detailed steps:

• Fix beginning balance issues during your first reconciliation in QuickBooks Online
• Fix beginning balance issues if you've reconciled the account in the past QuickBooks Online

If you have further questions, let me know by commenting below. I'll be around to help. Have a great day!