This isn't the kind of experience we want you to have, @Hahpc.
This issue was recently reported and already closed. But we've got an update from our engineers on how to fix it and I'd be happy to share it with you.
To get this fixed, you'll have to resend the invoice to your client so they'll get a new link to use when paying the invoice. Let me guide you how.
- In your QuickBooks Desktop, go to the Customers menu.
- Select Customer Center.
- Look for the specific customer, then set Transactions to show Invoices.
- Pick the invoice you'd like to resend.
- Once the invoice is open, click the Email button.
- Choose Invoice and enter email address.
- Click OK.
Once done, let your client use the new link to pay the invoice.
I've got you an article for more details: Email Sales Forms in QuickBooks Desktop.
You can also read this article to know more about paying invoices online: Common Questions about Paying Invoices Online.
In case you need tips and related articles in the future, feel free to visit our QuickBooks Community help website for reference: QBDT Self-help.
Feel free to visit us again if you have any other questions. We're always here to help.
