What is a W-2?
Updated: 3/06/2013
Article ID: IAS10439
A W-2 form, one of the most common tax forms, has a summary of employee earnings as well as tax deductions, such as Medicare and Social Security. Employers, by law, must complete and mail out a Form W-2 for each employee to whom they pay a salary, wage, or other compensation no later than January 31st.