Why do my employees have to complete an I-9?

For every new employee, employers MUST require them to complete Form I-9.

The I-9 is to verify that an employee is legally eligible to work in the U.S. And it's also advisable for employers to have employees complete Form 8850, which is a form employers must submit to the state workforce agency to determine whether the new employee falls within a targeted group that entitles the employer to a work opportunity tax credit.