how to mark an invoice as unpaid

Hello there, sheree.chapman. 
 

I can provide insight on how we can unpaid invoices in QuickBooks Self-Employed.

At this time, changing unpaid invoices in QBSE isn't possible. As a workaround, I recommend duplicating the invoice and deleting the paid one.

1. Go to the Invoices menu. 
2. Locate the paid invoice and click the drop-down menu under the Action column. 
3. Select Duplicate and Hit Save. 

Once done, let's delete the paid invoice. 

1. On the Invoices page, look for the paid invoice you'd like to delete.
2. Click the drop-down menu under the Action column.
3. Select Delete and then Click Yes to confirm.

To learn more about the invoicing feature in QBSE, feel free to check out this article: What's new with QuickBooks Self-Employed Invoicing?

Please know that I'm just a reply away if you need any further assistance managing your invoices in QBSE. Have a good one!