Important Tax ResourcesFor Your BenefitFree Consultation Important Dates March 15, 2021S Corps, Partnerships Tax Deadline April 15, 2021Individual and C Corps Tax Deadline April 15, 2021First-Quarter Estimated Tax Payment Deadline June 15, 2021Second Quarter Estimated Tax Payment Deadline September 15, 2021S Corps, Partnerships Tax Extension Deadline September 15, 2021Third Quarter Estimated Tax Payment Deadline October 15, 2021Individual and C Corps Tax Extension Deadline December 15, 2021Fourth Quarter Corporation Estimated Tax Payment Deadline January 15, 2022Fourth Quarter Individual Estimated Tax Payment Deadline Important Links Track Your Refund Florida Tax Information Florida Tax Forms Payment of Payroll Taxes Online IRS Forms and Publications Florida Division of Corporations Division of Workers’ Compensation