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The Daily Insight

How do I contact the Colorado Department of Revenue?

Author

Mia Ramsey

Published Feb 24, 2026

(303) 238-7378.

Is the IRS Open in Colorado?

Monday-Friday – 8:30 a.m.- 4:30 p.m. (Closed for lunch 12:30 – 1:30 p.m.)

Is there an extension to pay Colorado state taxes?

There is no extension for tax due. If you owe state income tax, 90% of the tax liability must be paid on or before May 17th to avoid penalties.

How long does the state of Colorado have to collect back taxes?

three years
Colorado extends the statute of limitations to three years from the date of last payment (the federal two- year time frame plus one year). Any refund or credit claim under this extended statute of limitations is limited to the amount of tax paid within the three-year Page 5 period, not previous payments or tax issues.

What time does the Colorado Department of Revenue open?

Hours: Taxpayer Service Centers are open from 8:00 a.m. to 4:30 p.m. Mountain Time (MT), Monday through Friday (except on state holidays).

How much income tax do you pay in Colorado?

Colorado Income Tax. That 4.63% applies to Colorado taxable income, which is equal to federal taxable income (with one exception, described below). Therefore, taxpayers who do not itemize deductions on their federal income tax return do not have the option to do so on their state return, and taxpayers who do itemize deductions federally,…

Where can I get my tax refund in Colorado?

In the best interest of all our taxpayers, the Colorado Department of Revenue implements measures to detect and prevent identity theft-related refund fraud. The Department has a “Validation Key” process where information will be requested to be entered on Revenue Online to validate their Colorado refund.

When is the last day to file income tax in Colorado?

The individual income tax payment and filing deadline has been extended by 32 days to May 17, 2021, without penalties and interest. Colorado’s income tax statutes do not incorporate retroactive federal statutory changes that are enacted after the last day of a taxable year.

Are there any tax deductions you can claim in Colorado?

One is that taxpayers who make donations to charity, but do not itemize deductions on their federal return, may be able to deduct those donations on their Colorado state income taxes. Another is the deduction for state income taxes (also known as the SALT deduction).