QuickBooks Desktop Webconnector
The QuickBooks Web Connector is required for all versions of QuickBooks EXCEPT QuickBooks Online and QuickBooks Desktop IIF. The Web Connector allows Books to send the Bills and Credits data into QuickBooks.
To download the Web Connector you can visit this URL:
(Scroll down to the section titled "Download and install the QuickBooks Web Connector"), or simply google the phrase "QuickBooks Web Connector" and select the relevant URL from intuit.com