Not filing federal tax returns is often the result of tax fraud. Each unfiled tax return can result in a one-year jail sentence and a $25,000 fine. The IRS could send a taxpayer to jail for up to 5 years. The IRS has gotten aggressive in recent years in their pursuit of tax cheats. The 7 worst results of not filing IRS tax returns are, Incur a 25% Penalty, incur added penalties, increases tax dues, delay in tax relief, lose tax refund forever and the 10 years of IRS collection statues. For more information read @ http://goo.gl/XQ2zFr