Can I mark a paid invoice unpaid

Hi there, @hblangers1.

Yes, you can mark the paid invoice to unpaid. This will re-open the invoice's status in QuickBooks. I'll guide you how:

1. Go to Sales in the left navigation menu.
2. Select the Invoices tab, then open the invoice.
3. Click on 1 payment link at the upper right hand above the PAID payment status.
4. Click on the link for the date.
5. On the Receive Payment window, click on More button at the bottom.
6. Click on Delete, then choose Yes.

I've added a screenshot for visual reference.

To learn more about receiving payments and applying credits in QuickBooks Online, please see these links below:

• Record invoice payments in QuickBooks Online
• Handle a customer credit or overpayment in QuickBooks Online

Let me know if you have a follow-up question about your invoice status or if you have any other concerns, by leaving a comment below. I'm always here to assist.