Did you originally install from the CD or the download?
If you installed from the CD it seems you can not download it from online now. You can't do both CD and download. See the info on this FAQ
https://ttlc.intuit.com/community/installing/help/i-bought-the-cd-but-my-computer-doesn-t-have-a-cd-...
So you need to call in to get the download pushed to your account.
Or try copying the CD to a usb flash drive. See SteamTrains post here. But this might only work for Windows.
https://ttlc.intuit.com/community/taxes/discussion/why-can-t-i-install-turbotax-on-my-laptop-via-dow...
