How do I undo a bank reconciliation? I reconciled the account, then one of the transactions was deleted so I can't reconcile it now.

Good afternoon, @MaryJo1459! Happy to have you here in the Community. Let's take a look at the options you have for undoing a bank reconciliation. 

If you have an accountant that uses Quickbooks, they can easily undo a reconcile for any account in your Chart of Accounts. If you don't have one, you also have the option of undoing each transaction until it's cleared. Here's how:

1. Go to the Accounting menu and select Chart of Accounts.
2. Find the account holding the transaction. Then select View register. 
3. Select the transaction you want to unreconcile to expand the view.
4. Select the checkbox. This changes the letter "R" in the box to either "C" for cleared or it will be blank.
5. Select Save.

You would continue to do this for all the transactions you need, or for every transaction if you want to unreconciled the whole account. Here's a helpful article on undoing reconciliations: Undo or remove transactions from reconciliations in QuickBooks Online.

If you need to re-enter that transaction go to +New in your account and add in the transaction (make sure you put in the right date, etc) and it will then show up in your register. 

Any questions you have, please reach out through this post and we can help you.