The following link will take you to the IRS website to download a current W-4 form (Employee's Certification of Withholding): http://www.irs.gov/pub/irs-pdf/fw4.pdf 
International employees are subject to special rules and should meet with an international tax specialist to complete Form W-4. Please schedule an appointment with an international tax specialist via the online appointment scheduling system .
Please note: You can update or change your elections through the Employee Portal .
If you choose to complete this paper form, please send the original to Employee Services. Copies and faxes will not be accepted.