Date
Category
March 1, 2026
Return Filing Deadlines
Farmer & Fishermen Tax Deadline
Deadline for Farmers & Fishermen to file their Form 1040 and pays all tax so they are not required to make quarterly estimated tax payments.
March 15, 2026
Return Filing Deadlines
Business Tax Returns
Deadline for Partnerships, Multi-member LLCs, and S corporations to file annual tax returns.
April 15, 2026
Estimated Payments Deadlines
1st Quarter Estimated Tax Payment
Estimated tax payments for the 1st quarter of 2026 are due for C-Corporations and Individuals.
April 15, 2026
Return Filing Deadlines
Individual and C-Corp Tax Returns
Deadline for Individual and C-Corporations to file annual tax returns.
April 30, 2026
Payroll Deadlines
Q1 2026 (Form 941 Payroll)
1st Quarter Employer's Quarterly Federal Tax Return.