You mean you want to fill out a 2015 return to see how to do it and to see if you come out close to the 2015 return that was filed? You can't use the online version (Online is only for 2016). You would have to buy the 2015 program and install it on a full Windows or Mac computer not a mobile device. You can buy the Desktop CD/Download program here <a rel="nofollow" target="_blank" href="
https://turbotax.intuit.com/personal-taxes/past-years-products/">https://turbotax.intuit.com/persona...>
