How to correct the bank balance to agree with the opening book balance?

Hi there, @adrian-cooperfin

I'm here to share some pointers on how you can resolve the difference on these balances.

Most beginning balance issues are actually caused by an incorrect opening balance.  

If your QuickBooks account is connected to your bank, the balance will automatically update to show your current account balance; but, if it is not connected, the balance will not update.

To review your opening balance, follow these steps below:

1. Go to Accounting, then select Chart of accounts.
2. Find the account on the list.
3. Select Account history.
4. Search for the opening balance entry. It should have "Opening Balance" in the Memo column.
5. Take note of the date and balance.

To learn more about the process, check out this article: Fix issues the first time you reconcile an account in QuickBooks Online

I'd suggest you do your monthly reconciliations to easily catch errors and keep track of your business' income. To reconcile, kindly refer to this article for the detailed steps: Reconcile an account in QuickBooks Online.

If you have any other QuickBooks or banking questions, please let me know by adding a comment below. I'm always here to help. Have a good one!