: Current mailing address for the worker. Wages and Tax Withholdings (Boxes 1–10)
: The unique ID for the individual worker. W2 Form 2012
: The federal tax ID assigned to the employer. : Current mailing address for the worker
: Optional internal tracking number used by some employers. W2 Form 2012
: Total Social Security tax deducted (typically 6.2% for 2012).