On F1 you are a nonresident alien for the first 5 calendar years, so 2009, 2010, 2011, 2013 and 2014. So in 2015 you would have had to start using the substantial presence test to determine residency, and assuming you were in the US all that time (except for short trips abroad maybe), you would be a resident alien for 2015 and 2016. As a resident alien you can use Turbotax. How did you file last year?
