I know I'm late to this party, but it will hopefully assist anyone looking for help; note that it only works with QB Service/online.

Tugger offer various connectors (of which QuickBooks is one); a free trial is offered, as well as report templates that can be used to import data via an OData link. They are easy to find via Google, but here's the link: https://tuggerapp.com/QuickBooksIntegration.

They only recently added support for QuickBooks and although I'm not an accountant, I come to this from the technical side, everything looks good.