2026 Tax Filing Season
| Mar. 16, 2026 | New York S corporation tax return due for calendar year filers New York Partnership tax return due for calendar year filers |
| Apr. 15, 2026 | Federal filing deadline to submit 2025 tax returns or an extension to file and pay tax owed is Tuesday, April 15, 2026, for most taxpayers. New York Personal income tax and fiduciary tax returns due for calendar year filers New York C corporation tax return due for calendar year filers |
| Sep. 15, 2026 | S-Corp/Partnerships Extension Deadline |
| Oct. 15, 2026 | C-Corp & Individual Extension Deadline |