You can all use it but only for one year. You have to buy a new program for each year. You can install it on 5 computers you own.
You can buy 2019 Desktop program here or look in the stores for sales. https://turbotax.intuit.com/personal-taxes/cd-download/
The CD has both Windows and Mac programs on it. If you buy the download you need to buy the right one. And by the way, you can buy any Desktop version. All the Desktop programs have the same forms. You just get more help and guidance in the higher versions.
