W2 Form 2012 -

: Optional internal tracking number used by some employers.

: Total federal taxable income for the year. W2 Form 2012

: The worker's legal name.

Page 4. a Employee's social security number. OMB No. 1545-0008. b Employer identification number (EIN) c Employer's name, address, IRS (.gov) : Optional internal tracking number used by some employers