We still sell TurboTax for tax years 2015, 2016, 2017, and of course 2018.
It's best to start with the earliest year and work your way forward. That way info transfers over year over year, the same way it would when you file yearly.
2015, 2016, and 2017 are sold as downloadable or CD software for both WIndows and Mac at this link: https://turbotax.intuit.com/personal-taxes/past-years-products/
You can do your 2018 taxes either online or with the software (might be best to stick with the software if you did the prior years in the software). You can get the software from us (Intuit) or Amazon - after April retail stores usually pull it. Link for Intuit: https://turbotax.intuit.com/personal-taxes/cd-download/
Since you're a student, you probably have a simple return, so go with Basic or Deluxe. I'd go with Premier if you have investment sales, and Home & Business if you had self-employment earnings (1099-MISC etc.)
