Form 4868 is the Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. According to the IRS, this form allows individual taxpayers to request an automatic six-month extension of time to file their federal income tax return. By filing Form 4868 by the original due date of the return (typically April 15), taxpayers can extend the filing deadline to October 15. However, the extension is only for filing the return and does not grant an extension for paying any taxes owed.