Here are some important fourth quarter 2024 tax-filing dates for businesses. OCT 15: If you’re the owner or operator of a calendar-year C corp. which filed an extension, file a 2023 income tax return. OCT 31: Report income tax withholding and FICA taxes for Q3 2024 (unless you’re eligible for a Nov. 12 deadline because you deposited on time, and in full, all the associated taxes due). DEC 16: If a calendar-year C corp., pay the fourth installment of 2024 estimated income taxes. Note: Certain deadlines may be postponed in federally declared disaster areas. We can provide more information about filing requirements and ensure you’re meeting all applicable deadlines.
