You can install Turbo Tax on 5 computers you own. Are you in Canada? This is for the USA program.
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.
Access your downloads here
https://shop.turbotax.intuit.com/commerce/account/secure/login.jsp?pagecontext=download
If you use the Online browser version it is only good for 1 return per account. You can use the same email address for 5 accounts. You would pay for each return.
