When I go to the app transactions (square) and click on for review, I'm seeing cash transactions from 2021 for review that were done in 2021?

Hi, kj461. I'll help you remove that remaining transaction. 

In QuickBooks, you can exclude certain transactions if some still appear in your for review tab. You can follow these steps: 

1. Go to Banking.
2. Under the For Review tab, tick the transactions that you want to exclude. 
3.  Click Exclude. 

Please note that it won't appear in any registers or financial reports once you exclude it.

You can also visit this article to help you with your transactions: Categorize Online Bank Transactions

If I could be any of assistance, feel free to reply with your concern/s. Take Care!