You will not be getting refunds for 2015 and 2016, @radbrad; those are time barred (SOL).
Regardless, according to your post, you have zero AGI for 2015, no withholding, etc., so it is not relevant.
With respect to 2016, the NOL can be used to reduce any tax you might owe but, most likely, you will need to add penalties for late filing and interest to your tax liability for that year.
