I NEED TO UNRECONCILE A BAK ACCOUNT. SHOW ME HOW TO DO

You'll need to manually unreconcile each transactions one at a time to undo a bank reconciliation in QuickBooks Online, Desire.

Here's how:

1. Click the Gear icon in the upper-right of your screen, and choose Chart of Accounts.
2. Locate the account and select Account history.
   
3. Click the transaction and review the check column. If the transaction is reconciled, you’ll see an R.
4. Select the transaction to expand the view.
5. Keep clicking the box until it's blank. It removes the transaction from the reconciliation.
   
6. Hit Save. Then close your register.

If you need to start over, I recommend consulting your accountant. They can undo your entire reconciliation using their QuickBooks Online Accountant (QBOA). If you don't have one, you can invite them by following these steps:

1. Click the Gear icon and select Manage Users.
2. From the Accounting Firms tab, click the Invite firm button.
   
3. Enter the accountant's details and click Save to send the invitation.

You can refer to this article on how to handle reconciliation, starting from checking its opening balance to fixing and editing completed reconciled transactions: Learn the reconcile workflow in QuickBooks.

Please don't hesitate to reply below if you have additional questions.