Final answer:
New employees are required to complete the I-9 form to prove their identity and work eligibility in the U.S. The W-4 form is for tax withholding and the W-2 is issued for income reporting, not collected from new hires. The Social Security Card may be used for the I-9 form.
Step-by-step explanation:
The document that must be obtained from new employees (EEs) is the I-9. This document is used to verify the identity and employment authorization of individuals hired for employment in the United States. A new employee must complete the I-9 form and provide documentation that establishes their identity and eligibility to work in the U.S. The Social Security Card could be part of this documentation, but the I-9 itself is the required form. The W-4 form is used for determining the amount of federal income tax withholding from an employee's paycheck. The W-2 form, on the other hand, is furnished by employers to employees and the IRS at the end of the year to report annual income and taxes withheld; it is not obtained from new employees but issued to them after they have earned income.
As a summary, new employees who are ready, willing, and able to work, have not earned income from a job in the past four weeks, and who are actively looking for work, will need to provide a completed I-9 form as part of their employment process.