Jump to navigation
If the IRS contacts you or the tax preparation software you or your tax professional indicates a federal or state return has already been filed using your information, contact the Department by completed our online Report Tax Fraud form to alert us so we can flag your tax account.
Also, see the following links on how to report identity theft.
Note: The Colorado Department of Revenue accounting system and the public-facing Revenue Online service have not been impacted by data security breaches. The Department has employed the “two-factor” authentication industry standard when taxpayers sign up to access their tax accounts in Revenue Online as a means to prevent the personal and tax information the Department has from getting into the wrong hands.
If you owe state income tax, 90 percent of the tax liability must be paid on or before Tuesday, April 18 to avoid penalties. Any remaining balance due would be subject to interest only. If you owe tax, you must either pay through Revenue Online or submit your payment with the Extension Payment Voucher (DR 158-I).
For information on how to file your federal return and for links to federal/state free filing services, see the Internal Revenue Service website.