The following forms are to be used by Staff Members who are liable to pay income taxes to United States tax authorities on United Nations salaries and emoluments:

• Consent for the internal revenue service to disclose tax return information to the UN (F243)
  
  
• Checklist (F247)
  
  
• Request for Settlement of Income Taxes (F65)
  
  
• Request for Settlement of Income Taxes - Supplementary Information to Form F65 (F65/A)
  
  
• Waiver of Rights, Privileges, Exemptions and Immunities (I 508)

Relative Circulars and Documents:

• Convention on the Privileges and Immunities of the United Nations (13 February 1946)
  
  
• Latest circular on income tax
  
  
• Circulars on income tax for prior years
  

Please also check the UN Tax Unit website and their FAQ section