For QuickBooks integration done right you need the fast, free and relatively easy to use QuickBooks Software Development Kit, The QuickBooks SDK has been available for more than six years at http://developer.intuit.com/. About 500 leading-edge programs make this QuickBooks SDK even easier to use or make QuickBooks far more powerful at http://marketplace.intuit.com/. This is QuickBooks integration done right.

QuickBooks users can work quickly & accurately, while never entering data twice. The SDK avoids QuickBooks data file corruption, which is common with IIF imports. The SDK insures QuickBooks integration done right in ways the IIF does not, since the SDK never breaks working applications when it or QuickBooks upgrades. Most important, Intuit may soon drop obsolete IIF imports from future versions. Therefore, saying you had problems linking QuickBooks with IIF is about like saying you cannot hold them together with a snale.