Dulsea Wandis

1120s Extension Due Date 2025. You have right up until tax day to file for an extension. April 15 with automatic extension to october 15.

Then you must pay the tax due by that date. For “regular” corporations (such as c corporations) that operate on a calendar year, their federal income tax return (form 1120) for the 2024 tax year is due on april 15,.