Are you thinking of making your new business a limited liability company?
Title: Business Extensions Due Description: Partnerships: File Form 1065 if you timely requested a 5-month extension. Corporations: File calendar year Form 1120 or 1120S if you timely requested a 6-month extension. Date: 2013-09-16
Date: 2011-06-15 – Corporate Income/Franchise: Second installment of current year estimated income tax due from calendar-year corporations (Form 1120-W) – Individual Income: Second installment of current year estimated tax by individuals, other than farmers or fisherman due (Form 1040-ES)
Date: 2011-03-15 Last day for calendar-year domestic corporations or foreign corporations with offices in the U.S. to file prior year income tax return (Form 1120 series). File Form 7004, together with payment, to obtain an automatic 6-month extension of time to file