Yes. Since you now have to log into an Intuit Account all your downloads and licenses are listed there (even if you bought it from somewhere else) so if you need to download to install it again or install on another computer, even on the other operating system (Windows, Mac).
You can download both Windows and Mac with your purchase.
Since you now have to log into an Intuit Account to install it all your downloads and licenses are listed there (even if you bought it from somewhere else) so if you need to download to install it again or install on another computer, even on the other operating system (Windows, Mac). And the download will always be up to date with all the updates.
See this, at the bottom Common Questions- How to switch from one operating system to the other
How to install TurboTax CD/Download software with license code
