April 17
Individuals. File a 2011 income tax return (Form 1040, 1040A, or 1040EZ) and pay any tax due. If you want an automatic 6-month extension of time to file the return, file Form 4868, Application for Automatic Extension of Time To File U.S. Individual Income Tax Return. For more information, see Form 4868. Then, file Form 1040, 1040A, or 1040EZ by October 15.
Household employers. If you paid cash wages of $1,700 or more in 2011 to a household employee, you must file Schedule H. If you are required to file a federal income tax return (Form 1040), file Schedule H with the return and report any household employment taxes. Report any federal unemployment (FUTA) tax on Schedule H if you paid total cash wages of $1,000 or more in any calendar quarter of 2010 or 2011 to household employees. Also, report any income tax you withheld for your household employees. For more information, see Publication 926.
Individuals. If you are not paying your 2012 income tax through withholding (or will not pay in enough tax during the year that way), pay the first installment of your 2012 estimated tax. Use Form 1040-ES. For more information, see Publication 505.