1) Tax Return for 2015 Filed 4/15/2021: 2) Tax Return for 2017 Filed 12/15/2018: 3) Tax Return for 2015 Filed 6/30/2016 -> Audited by IRS & Fraud Proposed: & What is Unique about this Statute? 4) Tax Returns for 2010; 2011; 2012; 2013; 2014; 2015; and 2016 - All NOT Filed: 5) What is the last date to obtain a REFUND for the 2016 tax return due on 4/15/2017? the return is not filed yet