al teat, 46 days before she due date of Form #2, See Form 0508 for fling Iriormation. Taxpayer Identification numbers. Employers use on employer Identboallon number (EIN) (00.0000000). Employees Use a Roo:a SOanitY number (SSN) (000.00-0000): When you lib a number, separate the nine digits properly to Sh