You can install the Desktop program on 5 computers you own. How to install the Desktop program
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-delivery/download-software-turbo...
Since you now have to log into an Intuit Account when you first install it, all your downloads and licenses are listed there (even if you bought it from somewhere else) so if you need to install it again or install on another computer, even on the other operating system (Windows, Mac) you can download it again.
