Last Updated August 10, 2017
Colorado Department of Revenue – Withholding Tax
Colorado Department of Labor and Employment – Unemployment tax
Add to existing company setup
Submit a request to your service team to add CO (withholding) and/or COSUI (unemployment) to your company setup. Please include the below with your request:
Colorado Department of Revenue
- Withholding – Deposit Frequency and Account number. If you’re unsure of your deposit frequency or account number, you can call the agency at 303-238-7378.
Colorado Department of Labor and Employment
- Unemployment – Tax rate and Account number. This can be found on a Tax Rate Notice or the Quarterly contribution and wage report. If you’re unsure of your tax rate or account number, you can call the agency at 800-480-8299.
Power of Attorney – POA is required, please obtain the prefilled form from your client service representative.
Register a new company
Colorado Department of Revenue and Department of Labor and Employment
You can apply for both taxes online at https://apps.colorado.gov/apps/jboss/cbe/index.xhtml. This will get you registered with both the Department of Revenue and the Department of Labor. Once you have registered online, you will immediately receive your account information followed up by a letter in the mail.
Third Party Registration and/or Power of Attorney Instructions
Power of Attorney is required, please obtain the prefilled form from your client service representative.