I want to share what I learned about registering 2021 Sage BusinessWorks. You need a Serial Number, a Registration Number, and an Unlocking Key FOR EVERY MODULE. The only way to get this information is to open your software and use Live Chat in the Help menu. The person who responds will give you the information you need to register the software. There is nowhere else you can go to get this information. This begs the question, can you still access the Help>Live Chat if you haven't registered the software and your free trials have been used up? I guess you need to make sure you register as soon as you install the software.