Colorado Individual Income Tax Forms (Tax Year 2025)
Colorado individual income taxes are administered by the
Colorado Department of Revenue.
This page provides official resources for Colorado individual income tax forms for tax year 2025, filed in 2026.
File Colorado Income Tax Online (2025)
Colorado provides electronic filing and payment through its official online system.
Taxpayers can file returns, make payments, and manage accounts using
Revenue Online.
Quick Links (Official Colorado Department of Revenue)
The official Colorado Department of Revenue website is available at
Colorado Department of Revenue.
General information about individual income tax is available on the
Colorado individual income tax overview page.
Official Colorado tax forms for all years are available in the
Colorado tax forms library.
Colorado Individual Income Tax Forms (2025)
Colorado residents file their state income tax return using
Form 104, Colorado Individual Income Tax Return.
Nonresidents and part-year residents file using
Form 104PN, Colorado Part-Year Resident or Nonresident Tax Return.
Taxpayers who make estimated payments use
Form 104EP.
An extension of time to file is requested using
Form DR 0158-I.
Previously filed Colorado individual income tax returns may be corrected using
Form 104X, Amended Individual Income Tax Return.
Colorado Individual Income Tax Deadlines (Tax Year 2025)
Colorado individual income tax returns for tax year 2025 are due April 15, 2026.
Approved filing extensions generally run through October 15, 2026.
Estimated tax payments are generally due on April 15, June 15, September 15, 2026, and January 15, 2027.
Colorado Taxpayer Resources (2025)
Taxpayers can file returns and make payments using
Revenue Online.
Additional guidance is available on the
Colorado individual income tax guidance page.
Contact information for the Colorado Department of Revenue is available on the
official contact page.
Disclaimer
This page links to official Colorado Department of Revenue resources for informational purposes only.
Tax laws, forms, and filing requirements may change.
Always verify information on the official Colorado Department of Revenue website.
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