Tax Schedule
Key dates throughout the year
2026 Deadlines
January 15, 2026
2025 Q4 Estimated tax payment due date
February 2, 2026
Business 1099 & W-2 filing deadline
February 28, 2026
Partnerships/S-Corp documentation deadline to avoid extension - KN deadline*
March 16, 2026
Partnerships/S-Corp 2025 filing deadline
March 31, 2026
Individual documentation deadline to avoid extension - KN deadline*
April 15, 2026
Individual 2025 tax filing and payment deadline
2026 Q1 Estimated tax payment due date
June 15, 2026
2026 Q2 Estimated tax payment due date
September 15, 2026
Partnership/S-Corp extended 2025 filing deadline
2026 Q3 Estimated tax payment due date
October 15, 2026
Individual extended 2025 filing deadline
*If full documentation is submitted after this date, I will make an effort to meet the filing deadline, but I do not guarantee it. I process returns in the order that full documentation is submitted.
Note: Form 990 series filings are due on the 15th day of the fifth month following the end of the fiscal year. A December 31 fiscal year-end has a deadline of May 15; a June 30 fiscal year-end has a deadline of November 15, and so on. An automatic six-month extension can be requested.