Accessing Your Colorado Tax Record with Revenue Online

Colorado small businesses benefit from a variety of initiatives aimed at making it easy to fuel the entrepreneurial fire, such as the easy to use website for the Colorado Secretary of State, where you can accomplish a huge variety of business startup tasks with just a few clicks of your mouse! Another excellent resource for individuals operating small businesses in the state of Colorado is called Revenue Online – a website managed by the taxation division of the Colorado Department of Revenue. Since this year’s first quarter tax filings are in the rear view mirror, this is a good time to think about looking ahead and making access to our Colorado tax records easier. How? Once you have filed your first tax return in the State of Colorado, you should consider signing up for an account to gain easy access to your tax records and a broad variety of services.

Things You Can Do with a Colorado Revenue Online Account

This is just a partial list; visit the Revenue Online site to see all of the tasks and information you can access with an account: For Individuals Taxpayers who create a Login ID will have access to their Colorado tax accounts. Taxpayers will have the ability to view their return history, view previous correspondence sent by the Department, and make electronic payments. You can also:
  • Amend a Return
  • Change Your Address
  • File a Protest
  • View Account Balances
  • View Your Payments
  • View Your Letters
  • View and Print Your Returns
For Businesses Businesses that create a Login ID will be able to file and pay a variety of taxes including Sales Tax, Withholding Tax and Corporate Income Tax. Plus
  • File or Amend a Return
  • Change Your Address
  • File a Protest
  • View Account Balances
  • View Your Payments
  • View Your Letters

Signing Up for a Colorado Revenue Online Account

For the most part, gaining access to your tax account via Revenue Online is a simple process, however, you need to be aware of an exception with regard to individual income tax accounts. For security reasons, you cannot obtain access to individual income tax accounts until you first acquire what is called a Letter ID number. The Letter ID number is exactly what it sounds like – an ID number associated with a letter from the Colorado Department of Revenue. If you have a recent letter from the Department, you can simply use the Letter ID number located in the upper right corner the letter – it doesn’t matter what the topic of the letter is. If you do not have a recent letter, you may request a Letter ID number on the Revenue Online website under “Additional Services” and “Request a Letter ID” (see image below). Revenue Online Services screenshot A letter containing the “Letter ID” number will be sent by postal mail to the address on record with the Department (so make sure yours is current before you submit the request!). It might take up to 10 business days to receive the “Letter ID” letter, but once you have it, you will be able to create a Revenue Online account for your individual income tax account, which is important if you are a single member Limited Liability Company because as such you will have filed your business taxes as part of your personal return. When you are ready to go, visit Revenue Online in your computer Web browser at To sign up for you account, you will need:
  • Taxpayer or Business Name
  • Tax ID Number, such as Social Security Number or ITIN from the IRS; Federal Employer ID Number (FEIN) or a Colorado Account Number (CAN) assigned by the Department
  • Address associated with your tax account
Once you have completed the registration process, you will receive an email that tells you whether you were able to get access to the account. Make sure to check your Junk email folder if you do not see the email in your Inbox – the email Subject line will say: Colorado Department of Revenue – Revenue Online Account Access Complete and will contain an Authorization Code that you will use the first time you log in, after which you will create your own password for the account. If you need help with your business taxes or business tax planning, contact me, Elizabeth Lewis, at the Law Office of E.C. Lewis, P.C., home of your Denver Small Business Lawyer. Phone: 720-258-6647. Email:

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