Which Federal form must employers complete within 3 days of hiring an employee for immigration purposes?

The correct form that employers must complete within three days of hiring an employee for immigration purposes is the I-9. This form is designed to verify the identity and employment authorization of individuals hired for employment in the United States.

The I-9 form requires employees to provide evidence of their identity and their right to work in the U.S., usually by presenting documents such as a passport or a combination of a driver's license and Social Security card. Employers must retain these forms and may be subject to audits, so timely completion is critical.

Other forms mentioned serve different purposes. The W-2 is used to report wages and taxes for employees at the end of the year, while Form 1099 is used to report income for independent contractors and other non-employee compensation. The SOC 1 form, or Service Organization Control report, relates to the internal controls of service organizations and is not pertinent to employee hiring procedures.