A:Answer Google "turbotax for macbook air", which will get you the site link to "turbotax intuit.com", click on that then scroll down and click "sitemap" to allow you to set up an account to download the desired turbotax software for your macbook air. Or, buy an external CD drive and connect it to your macbook air and purchase the cd turbotax software for installation.
You can also setup an account for free use of turbotax on their site, but your info will reside on their secure servers.