You can no longer get TurboTax software for 2013; nor is it supported even if you could buy it on e-bay, etc. it is too late to get a refund for 2013. You can try going on your state's tax website to get the 2013 form and prepare it by hand.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**