Before enabling Referrer tracking, VetBadger checks for a setting in QuickBooks. 


To enable this setting in QuickBooks:


Go to "Account & Settings" --> "Advanced" (in QuickBooks) you'll see the "Categories" section, and you can turn on "Track Classes". 

This screenshot shows how it should look. 


Once that is set, you might need to click "Refresh from Quickbooks" in your "Inventory Management" screen on VetBadger then the "referrer" selection should be available in VetBadger.