An employee master file is the central repository for all data needed to process payroll and maintain tax compliance. It must include the employee ' s FLSA status (Option A) to determine overtime eligibility, the service or hire date (Option B) for benefits and seniority, and the tax filing status (Option C) from Form W-4 for correct withholding. While employment eligibility (Option D) is a mandatory legal requirement for all workers, the actual verification documentation (Form I-9) is generally maintained in a separate, secure file rather than as a primary data element within the payroll master file. This separation is often recommended to comply with Immigration and Customs Enforcement (ICE) and USCIS guidelines, which suggest keeping I-9 records distinct from general personnel files to streamline audits and protect employee privacy. Payroll systems typically focus on the transactional data needed to calculate gross-to-net pay, leaving legal eligibility documentation to specialized HR systems.