How do I adjust starting and ending balances on a bank reconciliation that has already been committed?

Thanks for laying out the details of your concern, @hilary-posey. I recognize how important it is to fix the balances of bank reconciliation. I'll provide some information on how you can do it.

To correct the balances, you'll want to manually unreconcile each transaction to undo the reconciliation. Follow these steps to proceed:

1. From the Accounting menu, select the Chart of accounts tab.
2. Choose the account in question and click on View Register.
3. Select the items you want to unreconcile.
4. Keep clicking the R status until it shows blank or cleared (C).
5. Click on Save.
6. Choose Yes in the confirmation window.
   
   

Also, you can invite an accountant to undo your reconciled transactions without manually editing individual transactions from within the register. You can refer to this link for the detailed process: Undo a client's reconciliation in QuickBooks Online Accountant.

After unreconciling your account, you can now proceed to edit your opening balance. Once everything's good, you can reconcile your account again.

Additionally, I'm adding a couple of articles for your additional reference:

• Fix issues for accounts you've reconciled in the past in QuickBooks Online
• Learn the reconcile workflow in QuickBooks

Please post again or leave a comment in this thread if you have additional questions about opening and ending balances or anything else. I'm always ready to lend a hand. Keep safe, hilary-posey!