When completing the Form I-9, Employment Eligibility Verification for a household employee, the taxpayer MUST: Keep copies of all documents provided by the employees. Ensure that the Form I-9 is completed within the first 7 days of employment. Keep the completed Form I-9 in their own records, available for review by an authorized U.S. government official. Mail a copy of the Form I-9 to the IRS and the U.S. Citizenship and Immigration Services