@jmariearch75
ADDENDUM 2/24/2020:
This is an OLD thread from 2017 that transferred into this new community forum in June 2019. Unfortunately, all old threads from the old AnswerXChange were given a date as of the June 2019 transfer. The original answer below (written in 2017) contains outdated information about 2013 software that no longer applies at this point in time.
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ORIGINAL ANSWER from 2017 (outdated) :
TurboTax no longer sells or supports the 2013 software, but I see that Amazon is still selling the 2013 product as a download. There are also some third-party sellers at Amazon selling the 2013 CD version, but I'd shy away from the CD, since it is Release 1, and I'm not sure if you will have any updating problems at this point.
Also, if you have a modern computer OS such as Windows 10, I don't know how well 2013 installs and runs, but Windows has a "compatibility mode" which one can possibly use to install the program and run it simulating an earlier OS. If you're using a modern MAC OS X such as Sierra or High Sierra, then I don't know what problems you will encounter, but it might not work since the program was written before those Mac versions were around.
Another option if your return is simple, is to download the 2013 forms and 2013 Instructions from the IRS website and prepare them by hand.
<a rel="nofollow" target="_blank" href="https://www.irs.gov/forms-instructions">https://www.irs.gov/forms-instructions</a>
