Hi L Ruby!
This is a great question. Unfortunately the “undo reconciliation” feature that exists in QuickBooks Desktop is only available in the accountant’s version of QuickBooks Online, known as QuickBooks Online Accountant (QBOA). With that said, you will have to give an accountant who has a QBOA account access to your QBO file so that they can “undo” the reconciliation for you. There is no other way for you to access this feature in the regular versions of QuickBooks Online.
If you need help locating a QuickBooks Pro, the following article has some great resources & tips:
All the Best-