Accounting Services

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Colorado Forms & Instructions

IRS Forms & Publications

New Businesses

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Colorado "Revenue Online"

Colorado Department of Revenue Taxation Division

Colorado Secretary of State Businesses Main Page

Start a business in Colorado – online application

Sales Tax

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Colorado "Revenue Online"

Colorado Business Registration Online (to obtain sales tax license)

Colorado Department of Revenue Approved 3rd Party Website for Sales Tax Rate Lookup by Address

Colorado Department of Revenue Forms

Colorado Sales Tax Rates

Payroll

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Colorado Department of Labor Posters

Form I-9 - Employment Eligibility Verification & Instructions

IRS Forms & Publications

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

State of Colorado New Hire Reporting

US Department of Labor Posters

Contractors

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IRS form W-9 - Request for Taxpayer ID Number

IRS Publication: Contractor or Employee?

United States Department of Labor Posters