Which form does an employee complete to signify eligibility to work in the United States?

The I-9 form is the document that employees complete to verify their eligibility to work in the United States. This form requires employees to provide proof of identity and employment authorization. The I-9 process is an essential requirement for employers to ensure that they are hiring individuals who are legally allowed to work in the country. Completing this form helps maintain compliance with immigration laws and regulations.

The W-2 form is associated with reporting an employee's wages and taxes withheld for the year but does not pertain to work eligibility. The W-4 form is used by employees to indicate their tax withholding preferences to their employer, which addresses tax calculations rather than work authorization. The F-1 form is related to a specific visa type for international students and is not a general employment eligibility form. Thus, the I-9 is specifically tailored for establishing work eligibility, making it the correct answer.