What is Form I-9 primarily used for?

Form I-9 is primarily used for employment eligibility verification. It serves as a legal document that employers must complete for each employee hired in the United States. The primary purpose of this form is to verify the identity and employment authorization of individuals to ensure that they are legally allowed to work in the country.

When employees fill out Form I-9, they provide information about their identity and employment eligibility, which can include presenting specific documents such as a passport, driver's license, or social security card. Employers are required to retain these forms for a specified period and to present them for inspection by authorized government officials upon request.

The other options do not pertain to the function of Form I-9. For instance, the application for an Employer Identification Number is related to tax identification for businesses, while the IRS Individual Taxpayer Application pertains to personal tax identification numbers for individuals. These forms serve different purposes and do not apply to employment eligibility verification like Form I-9 does. Thus, the correct choice reflects the specific role that Form I-9 plays in the employment process.