• Small Business Administration
• Colorado Secretary of State
• Boulder Chamber 
• Colorado Small Business Development Center
  
• Top 10 Most Frequently Asked Questions About Starting a Business (From the Colorado SBDC)
• Intuit QuickBooks

• Internal Revenue Service
• Colorado Department of Revenue
• Social Security Administration
• Electronic Federal Tax Payment System (EFTPS)
• Colorado Department of Labor and Employment
• Colorado State Directory of New Hires - New Hire Reporting

• Federal Reserve Foreign Exchange Rates
• Bankrate.com

• 2009 Form 1040-ES (Federal Estimated Tax Vouchers for Individuals)
• 2009 Form 104-EP (Colorado Estimated Tax Vouchers for Individuals)

Colorado Business Registration

• Form CR 0100 (Business Registration form - Colorado Department of Revenue)
• Form CR 0101 (Instructions for Colorado Business Registration)
• Form UITL-100 (Application for Unemployment Insurance Account and Determination of Employer Liability)

• Sales Tax Return (City of Boulder)
• Business License Application for Sales/Use Tax (City of Boulder)
• Instructions for Business License Application for Sales/Use Tax (City of Boulder)
• Form DR 1102 - Account Changes or Closure (Colorado Department of Revenue/Sales Tax)
• Colorado State Sales Tax ZeroFile

• American Institute of Certified Public Accountants (AICPA)
• Colorado Society of Certified Public Accountants (CSCPA)