U.S. Citizenship and Immigration Services (USCIS)
USCIS home page ,   or call (888) 464-4218

Form I-9 (English/Spanish) and Handbook for Employers (M-274)
Form I-9   (English/Spanish and hardcopy/electronic)
M-274 Handbook for Employers

I-9 Central (latest Form I-9 guidance) & E-Verify
I-9 Central

Customs & Border Protection
Obtain an online copy of I-94 Arrival/Departure record

Department of Justice, Immigration and Employee Rights Section and U.S. Equal Employment Opportunity Commission
Filing a discrimination claim

U.S. Immigration & Customs Enforcement (ICE)
ICE home page

Social Security Administration
Apply online for a replacement Social Security Card