UNEMPLOYMENT INSURANCE TAX PROTEST INFORMATION

Unemployment Insurance (UI) Operations notifies employers of tax-rate changes on an annual basis. All tax rates are based on the Colorado Employment Security Act (CESA) 8-76-101, 8-76-102, and 8-76-103.

If you believe there is an error in the figures used to calculate your tax rate, you may file a written protest. The written protest must include the following:

• The business name and employer account number.
• A contact name and a telephone number at which the contact can be reached between the hours of 8 a.m. and 5 p.m. Monday through Friday.
• An e-mail address, if applicable.
• The form number and date of the protested notice.
• Information to support the protest.

A written protest may be submitted by:

• Mail to UI Operations, Tax Protest, P.O. Box 8789, Denver, CO 80201-8789.
• E-mail to unemp.tax@state.co.us.

NOTE: Enter the word “Protest” in the subject line for proper routing of the e-mail.

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