Hi @FritzF

The steps that @cetanorak listed work for me because I keep the invoice that I created from the estimate and I delete the copy after I use the copied invoice to apply my template and create a pdf version that I send to the client. So I still have the invoice created from the estimate that shows partial payments. 

But as @cetanorak says, it's very surprising that your engineers haven't yet been able to isolate the bug in software that was fully functional. I work in a web development company, and it's rare for us to not resolve a bug within hours.  Software is a different beast but there should be a resolution within days/weeks unless your engineers aren't actually working on the problem.  

Months ago I submitted the issue to customer support, and my accountant has also submitted the issue via his direct support contact, so at this point it's just a matter of waiting until Quickbooks resolves the issue.