In order for QuickBooks to interact with other software applications, access must be granted to a valid third party certificate.
When you try to integrate data with QuickBooks for the first time, BillQuick displays a QuickBooks - Application Certificate.
A QuickBooks user must decide whether to grant access to the BillQuick application and, if so, what options to set for the future.
Further, you must do the following:
1. In QuickBooks, go to Edit menu>Preferences>Integrated Applications.
2. On the Company Preferences tab, select the BillQuick-QuickBooks by BQE Software option and click Properties.
3. On the Access Rights tab, check the relevant Allow...options and click OK.