Same as Form 128 – public sector employers.
Registration numbers (for non-citizens) or birth certificate/passport details. Parental signatures for minors under 18. formulario adsef 128 y 153
, within the same deadlines as Form 931 for private sector. Same as Form 128 – public sector employers
Initially upon hiring, then to confirm or update changes (e.g., salary changes, category, deductions, marital status, family charges, etc.). formulario adsef 128 y 153