• Federal
• State
• Utah
• International

FEDERAL

• Federal Forms from the IRS
• 1040.com
  Includes federal and state.
• IRS Forms and Publications
• Tax Forms, Instructions, & Publications
  Includes federal and state.
• IRS Tax forms and income tax preparation help

STATE

• Federation of Tax Administrators (FTA)
  Forms from all 50 states.
• 1040.com
  Includes federal and state.
• FTA State Tax Rates and Structure 
  Provides tables comparing the tax rates and structure for all fifty U.S. states. State income, sales, and excise taxes are covered along with other related items. 
• Tax Forms, Instructions, & Publications
  Includes federal and state.

UTAH

• Utah Tax Forms & Publications
• Utah State Tax Commission

INTERNATIONAL

• Taxes Around the World
• International Tax Resources
• International Tax Forms
  " Tax Returns Required by U.S. Persons with Foreign Source Income and/or Foreign Persons with U.S. Source Income"