We have one full integration - which is in fact with QuickBooks. In other cases (other sysytems) we offer semi-integration. I mean, it's based on the export-import, but we are able to prepare macros which exports and imports all data needed for most account systems available on the market. We provide detailed info and cost estimation according to the specified requests.
And we also provide a common information about QuickBooks integration.
We use another similar application - Xero and it would be great to have integration instead of exporting and importing data.
Here are correct links to our legacy knowledge base and the articles about the QuickBooks integration:
Customer support service by UserEcho