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Colorado Income Taxes and CO State Tax Forms

efile Colorado taxes
"The Centennial State"

Start Federal and Colorado State Tax Returns

Start Colorado State Tax Return Only

Prepare and efile Your Colorado Tax Return

The tax software makes it easy for you to efile your state tax return and use the correct state tax forms. Prepare and efile your Colorado state tax return (resident, nonresident, or part-year resident) and Federal tax return together or separately at View the federal tax return filing requirements.

Colorado Income Tax Filing Deadline

The regular deadline to file a Colorado state income tax return is April 15.

Tax Deadline Date Type of Income Tax Return Filing Deadline / Due Date Description
April 18, 2017 2016 Colorado State Tax Return Due date for Colorado State Income Tax Returns - income tax filing deadline
April 18, 2017 2016 Colorado State Tax Extension Due date for Colorado automatic extensions
October 16, 2017 2016 Colorado State Tax Return Last day to efile a 2016 Colorado State Income Tax Return for tax extension filers and late efilers

View all state tax return filing deadlines.

Find federal income tax return filing deadlines.

Tax Year 2016 Colorado State Tax Forms

All of the following Colorado state tax forms are supported by the software:

Form/Schedule Description Can I efile this form?
Form 102 Claim for Refund on Behalf of Deceased Taxpayer

Form 104 Individual Income Tax Return
Form 104CR Individual Credit Schedule/Credit for Income Tax Paid to Another State
Form 104EP Estimated Income Tax Payment Voucher
Form 104PN Part-Year Resident/Nonresident Tax Calculation Schedule
Form 104PTC Property Tax/Rent/Heat Rebate Application
Form 204 Computation of Penalty Due Based on Underpayment of Colorado Individual Estimated Tax
Form DR0900 Individual Income Tax Payment Voucher
Form DR1366 Enterprise Zone (EZ) Carryforward Schedule 2

Colorado State Tax Forms that Cannot Be efiled

Colorado State Tax Withholding Form

Form Description
No state withholding form Colorado does not have a state tax withholding form. An employer should use the information from a federal W-4 to calculate an employee's state wage withholding.

CO Tax Extension

Extension Form Colorado Extension Instructions How to File

No form (CO grants an automatic extension)

Colorado grants all taxpayers an automatic 6-month extension of time to file (not to pay). The extended tax return due date is October 16, 2017. You do not need to file a form to get a Colorado state tax extension.

If you owe taxes, 90% of your tax liability is due on or before April 18. Any remaining balance due will only be subject to interest fees, as long as the rest of the tax owed and the return is by the extension deadline, October 16, 2017. Complete and file Form DR 0900 (Individual Income Tax Payment Voucher) if you are efiling your CO return but don't want to pay electronically OR if you're mailing your payment separately from your filed return.

Automatic extension granted

Important Reminder! If you are efiling a Colorado tax extension, you may need to efile a federal tax extension as well.

CO Tax Amendment

Amended Colorado state tax returns cannot be efiled; they must be filed by mail. Learn how to prepare and file a Colorado state tax amendment.

Important Reminder! If you are filing a Colorado tax amendment, you may need to file a federal tax amendment as well.

2015 Previous Tax Year CO State Tax Forms

Colorado state tax forms for previous Tax Years cannot be prepared and efiled online. You will need to print, fill out, and mail the forms to the CO Division of Taxation.

Form/Schedule Description How to File
Form 102 Claim for Refund on Behalf of Deceased Taxpayer

Download, complete, print out, sign, and mail

Form 104 Individual Income Tax Return
Form 104AMT Alternative Minimum Tax Computation Schedule
Form 104CR Individual Credit Schedule
Form 104PN Part-Year Resident/Nonresident Tax Calculation Schedule
Form 104PTC Property Tax/Rent/Heat Rebate Application
Form 204 Computation of Penalty Due Based on Underpayment of Colorado Individual Estimated Tax
Form DR0900 Individual Income Tax Payment Voucher
Form DR1316 Colorado Source Capital Gain Affidavit

Where's My Refund? - Check Your Colorado State Tax Refund Status

If you efiled your CO state tax return, expect your CO state tax refund within 7 to 14 business days. If you filed your return on paper, expect a longer wait for your state tax refund. Depending on which month your filed return is received by the CO state tax department, it will typically take between 21 and 75 business days to receive your refund.

Check your Colorado state tax refund status online.

CO efile Error Codes

If your Colorado state return was rejected, you will receive an error reject code. If you prepared and efiled your return on, we will provide you with an explanation of how to correct the error on your return. You may then resubmit your state return at no additional charge until it is accepted by the state.

View a list of all Colorado State efile Income Tax Return Error Reject Codes.

Colorado Tax Facts

CO Income Tax:

Colorado has a flat 4.63% tax rate.

CO Sales Tax:

Colorado has a state retail sales tax rate of 2.9%.

In 2010, CO lawmakers removed sales and use tax exemptions for certain items in order to balance the state's budget. Items no longer exempt from the sales/use tax include:

  • Candy and soft drinks (including those sold in vending machines)
  • Standardized computer software
  • Materials used in mail advertising
  • Sales by out-of-state retailers

Many cities and counties have their own sales tax rates in addition to the CO state sales tax rate. Certain county and special district taxes may also apply.

More information on CO Sales Tax

CO Personal Property Tax:

All real estate and personal business property in Colorado is taxable. This includes shelving, computers, equipment, furniture, and items that produce income within your business.

Odd Tax Fact:

Colorado has a sales tax on "nonessential [food] articles and containers" that are convenient to the consumer, but not essential to the sale of a food product. Therefore, items such as utensils, napkins, straws, and bibs are taxed. Carryout containers used by a consumer to carry leftover meals from a restaurant are also taxed. However, paper cups and disposable containers provided by the retailer (such as fast-food French Fry containers and pizza delivery boxes) are essential and not taxed.

CO State Tax Agency:

For more information, you can visit the website of The Colorado Division of Taxation.

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