📅 September Tax Deadlines to Know

  • September 15:
    • 3rd quarter estimated tax payments due
    • S-Corp (1120S) & Partnership (1065) returns if extended
    • Last day to fund SEP or Solo 401(k) for extended S-Corps
  • September 20 NYS Sales and Use Tax quarterly filing
  • Sept 30: Estate & Trust (1041) returns if extended
  • Oct 1: Deadline to set up a SIMPLE IRA or Safe Harbor 401(k) for 2025

👉 Stay ahead of deadlines—don’t risk penalties or missed opportunities. I’m here to help you stay compliant and keep more of what you earn.

Posted in Tax Filing, Tax Planning