Hi there, @info2228.

Let me guide you through the process of reconciling your bank account. If a reconciliation has already been done, you'll need to undo it one transaction at a time to maintain the accuracy of your accounts.

Here's how to do it:

1. Go to the Gear icon, then Chart of Accounts.

2. Choose the account you're working on and click on View Register.

3. Select the transactions you wish to unreconcile.

4. Click on the R status until it changes to blank or shows cleared (C).

5. Click Save.

If you prefer to undo an entire bank reconciliation, it's best to consult with an accountant. If you don’t have one, please refer to this ProAdvisor link for advice to ensure your reports remain accurate.

I've also included this article to assist you in case you encounter any issues while reconciling: Fix Issues at the End of a Reconciliation in QuickBooks Online.

If you require further assistance with undoing reconciliation in QBO, feel free to revisit this thread.