Colorado

Colorado state website
Small business events in your area

Doing business in the state

MyBizColorado
Department of Regulatory Agencies - Business License
Office of the Secretary of State
Colorado Office of Economic Development and International Trade

Taxation

Colorado Department of Revenue

Employer links

Colorado Department of Labor and Employment - Businesses and Employers
Unemployment Insurance
New Hire Registry

General

Small Business Administration - Colorado
Colorado State Agencies
Colorado Department of Personnel & Administration

SBA.gov's business licenses and permits search tool allows you to get a listing of federal, state and local permits, licenses, and registrations you'll need to run a business.