Corporate Tax Deadline 2024 Extension Deadline. Partnership and s corp tax deadlines. The main tax date in 2024 will be april 15th.

You should estimate and pay any owed taxes by your regular deadline to help avoid possible penalties. If you’re a c corporation or llc electing to file your taxes as one for 2023, your corporate tax return is due on april 15th, 2024—unless you use your own fiscal calendar, in which case it’s due on the 15th of the 4th month.