: If you have a physical copy, the serial number is typically printed on the box label or a sticker on the sleeve. MID.txt File

is unique to your specific license. You can find it through these official methods: Autodesk Account : Sign in to your Autodesk Account

: If you are installing from a folder or USB, look for a file named

. Using the wrong key during installation will lead to activation errors. Finding Your Serial Number is the universal product key for this version, your Serial Number

For modern versions, many users no longer need a serial number at all. Instead, you simply Sign In with your Autodesk ID