I have been plagued for a couple of years trying to integrate accounting type applications with QuickBooks.  It is easier said than done.  The hopes that systems are developed with integration in mind is only valid in school.  In the real world, applications, even applications as large as QuickBooks, are rarely built with easy to use API's.

Luckily, I came across /n software's IBiz Integrator for QuickBooks.  This tool makes my life super easy, as I am able to quickly and efficiently interface with QuickBooks.  Best of all, their support is fast.  On more than one occasion, I have faced an in-surmountable integration obstacle, and /n software has been super-fast on the response, usually the same day.