Hi TeamHow do I changes the status on an invoice from showing its paid to its not paid yet

Let me walk you through the process, Jayson.

Changing the status from paid to unpaid is a little bit tricky. You can do it by deleting the payment link to the invoice. 

Here's how:

1. Go to the Sales menu.
2. Select the Invoices tab.
3. Locate and open the invoice you want to change the status.
4. Select the 1 payment made link below the PAID status.
5. Click More, then choose Delete.
6. Hit Yes to confirm.

Once done, the invoice be back to unpaid.

Check out this article for further information if you can fix payments that were made to the incorrect invoices in the future: Fix a payment applied to the wrong invoice in QuickBooks Online.

You can post again if you have further questions about the process. We're always available to help you.