Since you did not file last year you need to first go to TurboTax.com and start with 2015 return. You will have to go to Products and Pricing and hover over it and choose cd/downloads to buy the download of the 2015 taxes and then once complete you should be able to go to Products and Pricing and purchase this years tax version. You want to file the 2015 first because you are going to need the adjusted gross income from it to file your 2016 tax return.