Who is require to withhold? • Withholding Agent.Gov and search for withholding requirements for updates, online tools, and more information, including: Forms and Publications The first step is to have the contractor complete Form W9, Request for Taxpayer Identification Number and Certification. A tax treaty is an agreement between the United States and a foreign country that exempts nonresident aliens of the United States from federal taxes. Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay. What U.S. tax forms am I expected to receive? 1 international students, who are maintaining their 1 student status, are eligible to work oncampus at UC Riverside. Hispanic Americans, people living in the United States who are descendants of Spanishspeaking peoples.