Colorado Tax Forms for 2023 and 2024

Tax-Rates.org provides free access to printable PDF versions of the most popular Colorado tax forms. Be sure to verify that the form you are downloading is for the correct year. Keep in mind that some states will not update their tax forms for 2024 until January 2025.

If the form you are looking for is not listed here, you will be able to find it on the Colorado 's tax forms page (see the citations at the bottom of this page).

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Form 204 - Estimated Income Tax Underpayment Form

If you failed to pay or underpaid your estimated income taxes the previous tax year, you need to fill out Form 204 to calculate and pay any penalties or fees owed.

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Form 104PN - Nonresident Income Tax Return

Nonresidents of Colorado who need to file income taxes in the state need to file Form 104PN.

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Form 104EP - Estimated Individual Income Tax Return

You must pay estimated income tax if you are self employed or do not pay sufficient tax withholding. Estimated tax payments are due on a quarterly basis; The due dates are: April 15 (first calender quarter), June 15 (second calender quarter), September 15

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Form 104 Instructions - Individual Income Tax Filing Guide

Use this instructional booklet to guide you in filling out and filing your Form 104 individual income tax return.

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Form 104 - Individual Income Tax Return

Form 104 is the general, and simplest, income tax return for individual residents of Colorado. You may file by mail with paper forms or efile online.

Colorado Tax Table - Printable tax table and quick reference

Tax-Rates.org provides a printable Colorado datasheet including an income tax table, a list of Colorado tax deductions, important URLs and mailing addresses, and more.

Additional Resources:

• All State Tax Forms
• Colorado Income Tax Rates
• http://www.colorado.gov/cs/Satellite?c=Page&cid=1177017551295&pagename=Reve