A QuickBooks Validation Code Generator is a unique code used to identify a QuickBooks software license. This number is required when registering QuickBooks with Intuit or when contacting customer support. The license number can be found on the order confirmation email or receipt from the purchase of QuickBooks.First, you can look in the product information section of your QuickBooks software. To do this, open QuickBooks and go to the Help menu. Then, select About QuickBooks Closing Entry from the drop-down menu. The product information section will display your license number.  The most important thing is to have your QuickBooks account information get click here Apropayroll.com.