Date
Return Filing Deadlines
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
Return Filing Deadlines
Individual and C-Corp Tax Returns
Deadline for Individual and C-Corporations to file annual tax returns.
September 15, 2026
Return Filing Deadlines
Extension Deadline Partn. & S-Corps.
Extended deadline for Partnerships and S-Corporations to file annual tax returns.
October 15, 2026
Return Filing Deadlines
Extension Deadline Indiv. & C-Corps.
Extended deadline for Individuals and C-Corporations to file annual tax returns.