How did you interact with the Department? Select an option below: Did you call us on the phone or visit one of our Taxpayer Service Centers? Did you interact with our Tax Conferee Department (file a tax dispute)? Did you interact with our the Audit, Collections or Compliance Department? Did you interact with the Policy Department, either via email or at a public hearing? Did you use Revenue Online, our online filing and account management portal? Did you use the Taxation Division website, Tax.Colorado.gov?