Generally, a corporation must file its income tax return by the 15th day of the fourth month after the end of its tax year. A new corporation filing a short-period return must generally file by the 15th day of the fourth month after the short period ends. A corporation that has dissolved must generally file by the 15th day of the fourth month after the date it dissolved.
If the due date falls on a Saturday, Sunday, or legal holiday, the corporation can file on the next business day.
Extension of Time To File. Form 7004 Application for Automatic Extension of Time To File Certain Business Income Tax, Information, and Other Returns, to request a six-month extension of time to file. Generally, the corporation must file Form 7004 by the regular due date of the return.
Form 7004 has been simplified and now consists of two parts. Part I includes, in form number order, all the forms for which Form 7004 is used to request an extension of time to file. Filers requesting an extension will enter (in the box located at the top of Part I) the form code for the return for which the extension is requested. Part II includes questions for all filers.
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