How to install on Mac
https://ttlc.intuit.com/community/installing/help/how-do-i-install-the-turbotax-software-for-mac/00/...
How to install Turbo Tax on Windows
https://ttlc.intuit.com/community/refund-status/help/how-do-i-install-the-turbotax-software-for-wind...
Have you already downloaded it? Access your downloads here
https://shop.turbotax.intuit.com/commerce/account/secure/login.jsp?pagecontext=download
How to download your software purchase
https://ttlc.intuit.com/community/installing/help/how-do-i-download-the-software-i-purchased-at-turb...
