W-4 — Employee's Withholding Certificate
Given to your employer so they can work out how much federal income tax to withhold from your pay.
TaxView guide
U.S. Citizenship and Immigration Services (USCIS)EmploymentGuide
Completed at hiring by the employee and employer to verify identity and the right to work in the US.
The form is downloaded and submitted on the authority's website.
Prove each new hire's identity and authorisation to work in the United States.
Identity and work authorisation documents from the official list (passport, green card, driver's licence and Social Security card…)
The I-9 isn't sent to USCIS: the employer keeps it and shows it if inspected.
The information on this page is general. If in doubt, the official source prevails.
Given to your employer so they can work out how much federal income tax to withhold from your pay.
TaxView guide
To get a work permit (EAD card) when your status allows it.
Immigration and residenceView guide