Important Tax Deadlines
Avoid unnecessary interest and fees by allowing TLBJ | CPA to handle your tax and accounting needs.
(Days below are applicable unless they fall on a weekend or Holiday)
March 15
S-Corp Deadline (Form 1120S / Form 1120)
March 15
September 15
S-Corp Extension Deadline & Final Day to File a Return
March 15
990 Informational Tax Returns with a 12/31 Year End
October 15
1040 Extension Deadline & Final Day to File a Return
April 15
Estimated Tax Payment Dates
Payments are due in four installments. The following are the dates for the 2026 tax year.
Quarter 1- April 15, 2026
Quarter 3-September 15, 2026
Personal Tax Deadline - (Form 1040)
Quarter 2-June 15, 2026
Quarter 4-January 15, 2027
November 15
990 Informational Tax Returns with a 6/30 Year End