I'm here to share information about processing your customer's online payment, @azpcp.
As of the moment, there aren't yet tutorial-ready references for customers who are paying invoices online. Mostly they'll have to do is select Review and pay or Pay invoice and enter the payment details in order the process the online payment.
This article explains more about how you can work with a payment link in an invoice: Payment Links for QuickBooks Desktop.
I'm adding this reference with the tips you share with your customers they can't pay invoices online: A Few Ways to Fix Issues to Finish an Online Sales Transaction.
It'll always be my pleasure to help if you have any other concerns besides online invoicing. Please let me know by clicking the Reply button and leaving a comment below. Have a good one!
