The State of Colorado has issued the following guidance regarding income tax filing deadlines for individuals: The state filing deadline is April 15th, 2026. Returns that are mailed must be postmarked by April 15th.

February 6, 2025 - The Colorado Department of Revenue has not started accepting individual income tax returns as of Feb. 4, but the state website says to check back in early February. Last year, the Colorado Department of Revenue began processing returns on Feb.

The Colorado Department of Revenue, Division of Taxation, is hosting a virtual workgroup meeting to discuss the promulgation of new and amended tax rules regarding mandatory electronic filing and payment of certain taxes and fees.

November 4, 2024 - Extension to File Taxes in Colorado for 2025 The Extension Deadline for Colorado individual tax returns is October 15, 2026.

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2025 Individual Tax Returns Due — Most taxpayers have until April 15 to file tax returns.

Colorado will likely surpass $1 billion in sales and $200 million in tax revenue before year’s end; November figures will be published in January with complete data for 2025 becoming available in mid-February.

Check the deadlines for IRS or Federal Tax Returns. The majority of deadlines listed here are for the 2024 tax year and are due in 2025; some apply to upcoming years and some are IRS or federal deadlines. After Oct. 15 you can no longer e-file tax returns or current year tax amendments. They ...

February 21, 2025 - 21, read: “The 2024 return links for Individual income tax, Fiduciary income tax, and Business income tax are coming soon. Please check in late February 2025.” · Colorado generally begins accepting electronic returns for individual, fiduciary ...

STATEWIDE - Today, Governor Polis and the Colorado Department of Revenue announced that Direct File will be available starting for tax year 2025, which Coloradans will file for in 2026. Coloradans will be able to use Direct File, made possible by the Biden-Harris Administration’s Inflation ...

February 18, 2025 - As of Tuesday, the Department of ... February 2025.” · The department typically begins accepting state tax returns by late January....

March 12, 2025 - In previous years, the returns were accepted as early as late January, but this year was delayed by the implementation of changes to the tax code, according to prior Coloradoan reporting. The state does not give a timeline for how long it will take to process returns, but taxpayers can check the status of their refunds on the Colorado Department of Revenue’s website.

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The Extension Deadline is October 15, 2025, to file your Colorado corporate income tax return.

October 31, 2024 - As of Tuesday, the Department of Revenue’s website still said that the “2024 return links for individual income tax, fiduciary income tax, and business income tax are coming soon. Please check in early February 2025.” The department typically ...

March 15, 2025 - The following TurboTax help article will give you more details, but the state of Colorado is not yet accepting tax returns for processing. They have been delayed.

February 19, 2025 - The Internal Revenue Service began accepting returns on Jan. 27. Colorado tax season typically follows a couple of weeks after the IRS begins rolling. April 15, 2025, is the last day you can file your federal or state taxes this year.