Related Information
Question: How do I file a zero return through Revenue Online?
The password and ID number you used in our old zero file system will not work through Revenue Online. In order to file a zero return through Revenue Online you must either request a Letter ID number or use the Gross Sales and Services amount (cannot be zero) from a recent return. Letter IDs will be mailed to the current address we have on file.

To get a Letter ID:

  • Go to Revenue Online
  • Under "For Businesses" click on "Request Letter ID."
  • Follow the prompts
  • It will take about 5 business days to receive the Letter ID

If your mailing address has changed contact our Customer Support Center 303-238-7378 to have the address updated.

Once you receive the Letter ID in the mail you can set up an account and file your return through Revenue Online.

Setting up an account

  • Go to Revenue Online 
  • Under "Sign up for Revenue Online" click on "Sign Up (Individual or Business").
  • Follow the Prompts

Step 1

Account Type

  • Click on the drop-down box and choose the Account Type (example, Sales Tax or Wage Withholding) you want to access

Select ID Type

  • Click on the drop-down box and choose an ID number (it is best to use your Colorado Account Number)
  • The CO Account # is an 8-digit number. This is your original 7-digit number with a zero in front of the account number
  • Enter Email Address
  • Confirm Email Address
  • Contact Phone (optional)

Step 2

Log in Information

  • You can click on the box "Use Email As Login ID" or enter a different Login ID
  • Enter Password
  • Confirm Password
  • Secret Question (click on drop down box and choose a question)
  • Answer
  • Confirm Answer

Step 3

Enter Account Information

  • Enter Zip Code. Use the 5-digit code. The 9-digit Zip plus-four code is not necessary. This is the Zip Code we have on file for your account. If you your address has changed, you must contact our Customer Support Center 303-238-7378 to have the address updated so that you may use Revenue Online.
  • Colorado Account Number including Branch ID (12 digits). Your 12-digit account number would be your 8-digit account number plus 4 zeros for the branch. 
  • Select one of the following (next to this wording you will see a down arrow, click on the arrow and select Recent Letter ID number.)
  • Enter Recent Letter ID number received in the mail.

You should receive an email where the Subject line will say: Colorado Department of Revenue - Revenue Online Account Access Complete. The email will contain an Authorization Code that you will use ONLY the first time you Login. If you don't get access, try again and verify your Account information. If you don't see the email, check your Junk email folder and allow email from the Colorado Department of Revenue.

Once you have your Authorization Code return to Revenue Online via the link in your email.

  1. Enter the Login ID and Password you created.
  2. Click on the Login button.
  3. Enter the Authorization Code from you email (first time only).
  4. Click Login. You should then be in your account.

After your first Login, you will need only the Login ID and Password that you created.

Once you Login, you will be in your tax account. Click on the blue link that shows your Colorado Account Number. You can then begin to manage your tax account and file your returns.

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