Visit the QuickBooks License Look Up page to retrieve them. Knockout Cs6 Download. If the look up tool cannot find your license number or key code, the web page will display a link for you to contact customer service for further assistance: • If the license look up is unsuccessful based on your phone number, you can log in to your account to find the information. • If you are unable to log in, click the Contact Us link and select your product for the correct number to call. • Before you call Customer Service, make sure you have the required proof of purchase to obtain a license or key code number: • If you purchased QuickBooks or Point of Sale directly from Intuit, give the Order Number from your Intuit packing slip to the Intuit customer service representative when you call. You can look up your Intuit order number from the Order Status page. • If you purchased QuickBooks or Point of Sale from a local retailer, fax proof of purchase information to 520-844-6451 before you call customer service.