Ans: You can undo a reconciled transaction in QuickBooks in the following way: 1. Go to the Accounting option in the left menu. 2. Then, click on Chart of Accounts. 3. Now, look for the account that holds the transaction and hit the View Register option. 4. After this, tap on the transaction you want to un-reconcile and expand the view. 5. You will see the letter R written against it if it is reconciled. 6. You need to hit the checkbox until it goes blank to remove the transaction from reconciliation. 7. Now, hit Save.