Corporate Tax Extension Deadline 2024. Partnership and s corp tax deadlines. 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.
For individuals, that means you can still file for a tax extension right on april 15, 2024. You should estimate and pay any owed taxes by your regular.