The Internal Revenue Service (IRS) gives this advice when hiring new employees.
Eligibility for Employment. You must verify that each new employee is legally eligible to
New hire reporting. You are required to report any new employee to a designated state new hire registry. Many states accept a copy of IRS Form W-4 with employer identification added. Call the Office of Child Support Enforcement at 202-401-9267 or access its Web site for more information.
Income tax withholding. Ask each new employee to complete the latest IRS Form W-4.