I know how precious time is for you and the relevance of sending invoices to your customers, @fhample. Let me point you in the right direction to resolve this issue.
It looks like you contacted our support before and the issue remains. To assist you further, I'd still advise contacting our live support team once again to follow up on your case and investigate the problem further. Follow the steps below to reach them:
- Sign in to your QuickBooks Online company.
- Go to the Help menu and select Contact Us.
- Enter your concern and click Continue.
- Choose between Chat with us or Have us call you.
For more information about our contact feature and support hours, please refer to this article: Get help with QuickBooks products and services.
After you process a payment from a customer, you need to record it in QuickBooks to mark the invoice as paid, you can check this resource to learn more about it: Record invoice payments.
If you have any other concerns regarding invoices, please tag me in the comment section, @fhample. I'll assist you in any way possible.
