Is it your son's computer? Do you own it? Actually you are not suppose to share it. The License is to install Turbo Tax on 5 computers you own.
There is a problem if you first installed the CD. It doesn't connect you to an account you can find. You have to call in and ask for the download and a new License Code. Hopefully you get a customer service person who know about it.
This guy explained it good
https://ttlc.intuit.com/community/taxes/discussion/cannot-reinstall-download-cd-product-on-second-co...
