C Corp Tax Filing Deadline 2024. The 2024 deadline to file individual income tax returns for 2023 is april 15, 2024. Deadline for filing the 2023 tax return (form 1120) and paying any tax due.

If you apply for a tax filing extension before tax day, you must submit your return by this date. Deadline for filing the 2023 tax return (form 1120) and paying any tax due if an extension is requested.