Corporate Tax Return Deadline 2025. If you’re a c corporation or llc electing to file your taxes as one for the 2024 tax year, your corporate tax return is due on april 15th, 2025—unless you use your own fiscal calendar, in. Deadline for extended c corporation and sole proprietorship returns.
Deadline for extended c corporation and sole proprietorship returns. This tax calendar gives the due dates for filing returns and making deposits of excise taxes.