You would typically need to complete an I-9 Employment Eligibility Verification Form, available from the USCIS, have the employee complete a W-2 form, available from the IRS, and also submit any required New Employee Registration Form for the state in which you operate. You should make sure that you keep a record of the new employee's Social Security Number, ideally verifying the number from the employee's Social Security Card. You will also have to periodically file tax forms relating to their income.

Labor laws vary by state; it is possible that you are not required to offer vacation time to any of your employees. You can ask that your employees enter into a formal employment contract at any time - but it is usually a good idea to have any such contract drafted by a lawyer, or at least reviewed to make sure that its terms are consistent with state law.