: The unique ID for the individual worker.
: Total Social Security tax deducted (typically 6.2% for 2012).
: The worker's legal name.
: Optional internal tracking number used by some employers.
The 2012 Form W-2, Wage and Tax Statement, follows a standardized text structure for identifying information, income boxes, and statutory codes. For that tax year, the Social Security wage base was capped at . Identifying Information (Boxes a–f)
: Total Medicare tax deducted (typically 1.45%). 7. Social security tips : Tips reported by the employee.
: Current mailing address for the worker. Wages and Tax Withholdings (Boxes 1–10)