I am running Proseries Professional and I have been told by PS reps that it is possible to import my ProSeries invoices directly to the client in QB to eliminate double-entry. 

There are even questions here (answered by ProSeries reps) that state it is possible but with no explanation as to how!

However, no one I speak to at ProSeries actually knows how...and told me to call Quickbooks. Before I go down that rabbit hole, anyone have any ideas?  Thanks so much!