When you purchase a new QuickBooks Desktop product, you are provided with a license key or validation code to validate the product. You can get the license information on the packaging sticker when you purchase the installation disk for QuickBooks software. On the other hand, if you make this purchase online, then the license key will be sent to you through an email provided in CAMPS (Customer Account Management Portal). Every time, you make an attempt to install or update the software, you just need to provide the license information compulsorily. However, if lost or forgotten, you can find QuickBooks validation code in the registry by reading this post until the end.