RESOURCES
New Businesses
Colorado Department of Revenue Taxation Division
Sales Tax
Colorado Business Registration Online (to obtain sales tax license)
Colorado Department of Revenue Approved 3rd Party Website for Sales Tax Rate Lookup by Address
Payroll
Colorado Department of Labor Posters
Form I-9 - Employment Eligibility Verification & Instructions
IRS Publication: Contractor or Employee?
Colorado Department of Labor Unemployment - MyUI Employer
IRS W-4 - Employee's Withholding Allowance Certificate
Social Security Number Verification Service