2025 I9 Fillable Form. Washington — the internal revenue service opened the 2025 tax filing season today and is accepting and processing federal individual tax year 2024 returns. Employers must start using the updated form on november 1, 2023;

Changes were made to the form to simplify and clarify the identity verification process; Federal law requires that every employer* who recruits, refers for a fee, or hires an individual for employment in the u.s.