I wish I could make it easier for you to find the validation code, but there is one thing that you can do to keep your business up and running, dan888.

Generally, when you purchase a QuickBooks software installation disk, you can find the license information or validation code on the sticker in the packaging, and if you have purchased the software online, you can find it in the confirmation email. If you have lost them, you'll have to contact our Technical Support Team to get the code. 

If you'll have to start with QuickBooks Desktop, here's everything that you can check out: Start Here with QuickBooks Desktop.

Please let me know if you any other questions about QuickBooks reactivation. Don't forget we're here to help you so you can start with your business.