I bought turbotax at Costco doesn't know how to download to my computer.

[VolvoGirl]

There should be a card in the CD case that says how to download it and you will need the 14 digit code from it to enter.

How to install Turbo Tax if you don't have a CD drive

https://ttlc.intuit.com/community/installing/help/i-bought-the-cd-but-my-computer-doesn-t-have-a-cd-...

To install on Mac.  I bought the CD from Costco and don't have a CD drive on the Mac.  Was able to download it.  It went very smooth. When you see the download on the screen to download, first click on the blue Copy Code link to the left.  Then after you install it and need to activate you can do Command + V to paste the code into the box.