Domestic Vendors

• Instructions W-9 -To be completed by the vendor when tax identification number issues occur.

• Instructions SS-8 To be completed for determination of Independent Contractor Determination

Foreign Vendors

• Instructions for Form 8233 – Instructions for completing form 8233

• Instructions for W-8 -Instructions for completing forms W-9BEN, W-8BEN-E, W-8ECI, W-8EXP and W-8IMY

Tax Information

• Request for Tax Exempt Certificate

• Tax Exempt Notice

Office of Management and Budget

• OMB Circular

Federal Acquisition Regulations

• FARS Listing