Check the "Fulfillment Notification" or "Autodesk Upgrade and Licensing Information" email sent to you after purchase. :
If the software is already running, click your in the top right and select Manage License .
Navigate to and locate AutoCAD 2022.
Many modern Autodesk subscriptions use "Sign In" activation rather than serial numbers. If you do not see a serial number in your account: Autodesk 2022 Product Keys - Microsol Resources
Product keys are used to distinguish between different software packages that contain the same version of AutoCAD.