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
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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
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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.
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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.