If it is a download version check your e-mails.
If you paid by credit card or Paypal get the details and contact seller may be they help you.
If you have registered your product in that case go Magix website and check your registered product.
Finally there are some software to trace product key , you can search on web. This could be helpful only if Magix product is installed on computer.
nihon94
Ok I bought it out of Best Buy So I Go to where?
Ok I bought it out of Best Buy So I Go to where?
As you got no options better ask Best Buy if they can help you out? Otherwise if your product is registered with Magix ask Magix and also check on Magix Website if you can find information about your product.
nihon94