What is the extended due date for 1120-S?

The extended due date for an S-Corporation to file Form 1120-S is September 15. This 6-month automatic extension is from the original due date of March 17, which is the actual calendar year deadline for filing Form 1120-S. You can obtain the extension by filing Form 7004 on or before the original due date of the return.

To learn how to e-file Form 7004 in ExpressExtension, click here.