Form W-2

IRS Official website: About Form W-2, Wage and Tax Statement

Every employer engaged in a trade or business who pays remuneration, including noncash payments of $600 or more for the year (all amounts if any income, social security, or Medicare tax was withheld) for services performed by an employee must file a Form W-2 for each employee (even if the employee is related to the employer) from whom:

• Income, Social Security, or Medicare tax was withheld.
• Income tax would have been withheld if the employee had claimed no more than one withholding allowance or had not claimed exemption from withholding on Form W-4, Employee's Withholding Allowance Certificate.