Hi there, gio,
You can find the added or matched transactions in the In QuickBooks tab.
- In the Banking page, select the In QuickBooks tab.
- Select the bank transactions and click on the Undo button.
- Go back to the For Review tab to see the undo transactions.
Don't forget to match them again. You can check this article: How to add and match downloaded banking transactions.
Have a good day!