when are corp taxes due
If your business is organized as a corporation, the income tax return or extension is due by the 15th day of the 3rd month after the end of your tax year. For example, if your corporation is a calendar year taxpayer with a December 31 year end, you must file a 2015 tax return or extension request by March 15, 2016. If your business is organized as a partnership, your income tax return or extension is due by the 15th day of the 4th month after the end of your tax year. For example, if your partnership is a calendar year taxpayer, with a December 31 year end, you must file a 2015 tax return or extension request by April 15, 2016.