hey guys, just go to irs website and file previous year's taxes with just a small late-payment fee (you could call it a fine) but that is the legal measure to rectify what you didn't know earlier or left it out on purpose.  then you can relax with a budwiser, i prefer pale ale! and if you were supposed to file taxes and should have been entitled to get back a few bucks, what you need to pay as a fine is just nominal stuff!
Good luck guys!
note: this is not a legal advice, only sharing what i have seen others do!