This only works if you haven't installed from the CD anywhere yet.
If you bought the CD but want to download it,
There should be a card in the CD case on on the CD envelope that says how to download it and you will need the 14 or 16 digit code from it to enter.
How to download Turbo Tax instead of using the CD
https://ttlc.intuit.com/community/installing/help/i-bought-the-cd-but-my-computer-doesn-t-have-a-cd-...
