Hi there, davidhaleytn.
You've come to the right place for answers. I'm happy to help, follow these steps to undo the "Marked as paid" on your invoice.
- Locate the invoice transaction.
- Click the 1 Payment link just below the PAID status.
- Click the Payment date link.
- Click More at the bottom, then choose Delete.
- Click Yes in the Pop-up Window.
Once those steps are complete you're invoice should be corrected.
If you have any other questions, feel free to post them down below.
Thanks again and have a lovely weekend.