File Form 4868 by April 16, 2012 for a six month extension, if you're requesting an extension, you must estimate your tax liability and pay the balance when you file the request. If your paperwork is late, you may be subject to a late-filing penalty of 4.5% per month of tax owed and a late-payment penalty of 0.5% per month of tax due.

60% of American's have a paid preparer deal with their tax forms.