26 C.F.R. § 31.3307-1 Deductions by an employer from remuneration of an employee.
Title 26 - Internal Revenue
Any amount deducted by an employer from the remuneration of an employee is considered to be a part of the employee's remuneration and is considered to be paid to the employee as remuneration at the time that the deduction is made. It is immaterial that any act of Congress or the law of any State requires or permits such deductions and the payment of the amount thereof to the United States, a State, or any political subdivision thereof.
Title 26: Internal Revenue
PART 31—EMPLOYMENT TAXES AND COLLECTION OF INCOME TAX AT SOURCE
Subpart D—Federal Unemployment Tax Act (Chapter 23, Internal Revenue Code of 1954)
§ 31.3307-1 Deductions by an employer from remuneration of an employee.