The New York State Department of Taxation and Finance encourages taxpayers to file state income tax returns and pay any taxes owed by April 15, 2026, with the deadline set for midnight. Officials warn that failing to meet the deadline may result in penalties and interest, increasing the total amount owed.
Taxpayers who are unable to complete their returns on time may request an extension to file. However, the department emphasizes that an extension only provides more time to submit a return, not more time to pay. Those seeking an extension must submit a request and pay the full amount of their properly estimated tax liability by April 15 to avoid additional penalties or interest.
For taxpayers choosing to file by mail, returns and payments must be postmarked no later than April 15, 2026. Officials say late postmarks could lead to added charges. Before sending a paper return, taxpayers are advised to verify the correct mailing address through the state Tax Department or the Internal Revenue Service to prevent delays or misdelivery.
The agency is also urging taxpayers to consider filing electronically instead of mailing paper returns. E-filing is generally faster, more secure and more efficient, reducing the risk of errors and processing delays associated with traditional mail. Electronic filing also provides confirmation that a return has been received and can speed up the processing of refunds.
Several free e-filing options are available to eligible taxpayers. The state’s Free File program offers no-cost filing for qualifying individuals, while other free services can be accessed through the Tax Department’s website. Additional assistance is available through GetYourRefund, which connects eligible taxpayers with free filing support.
Officials encourage taxpayers to review their eligibility for these programs and choose the filing method that best suits their needs. With the deadline approaching, early preparation may help ensure accurate submissions and reduce the likelihood of last-minute complications.

