I'm finally convinced that QBO programmers are [Removed by moderator] and actually have no idea about accounting. The "send receipt" feature is now gone for whatever reason. Jee-whiz, you think an accounting software should be able to send receipt? Ya think?! Following your steps above does not show the invoice as "Paid In Full" or mark it "Paid" it just sends a $0.00 invoice. Bunch of monkeys running the show.