If you will not owe, or if you were going to get a refund, there is no penalties if you file within 3 years of the year the return was due. For 2013, that deadline is today 4/18/2017. I have included 2 links below, the first gives you more information on filing and filing late and the other gives you the link to file past returns.
Penalties for filing late and other information
https://ttlc.intuit.com/replies/4159821
Filing past returns
https://ttlc.intuit.com/replies/3301770
