Hello there, @Andrew93.

Thanks for following the steps. In addition to IamjuvViel's answer, you'll need to delete the deposit payment for the invoice.

Here's how:

1. Open the invoice transaction in question.
2. On the right panel of the Invoice window, select the Transaction tab.
3. Under RELATED TRANSACTIONS on the right pane, it will show the deposit you used as the payment.
4. Click the deposit transaction (it will appear as the Make Deposits window).
5. Click Edit at the top menu, and select Delete Deposit (Ctrl + D).
6. Then hit OK to confirm.

Once deleted, you can go to the Undeposited Funds account on the Chart of Accounts. Deleting deposits with payments that are deposited under the Undeposited Funds will make it available to the Payments to Deposit window. Then delete the payment transaction manually from there.

These tracks will help remove the deposit as well as the payment transaction.

For additional insights about depositing payments into the Undeposited Funds account in QuickBooks Desktop, check out this article.

Feel free to place a comment anytime you need assistance with QuickBooks. I'm here to help you always. Stay safe and more power to your business!