26 C.F.R. § 31.3502-1 Nondeductibility of taxes in computing taxable income.
Title 26 - Internal Revenue
For provisions relating to the nondeductibility, in computing taxable income under subtitle A, of the taxes imposed by sections 3101, 3201, and 3211, and of the tax deducted and withheld under chapter 24, see §§1.164–2 and 1.275–1 of this chapter (Income Tax Regulations). For provisions relating to the credit allowable to the recipient of the income in respect of the tax deducted and withheld under chapter 24, see §1.31–1 of this chapter (Income Tax Regulations). [T.D. 6780, 29 FR 18148, Dec. 22, 1964]
Title 26: Internal Revenue
PART 31—EMPLOYMENT TAXES AND COLLECTION OF INCOME TAX AT SOURCE
Subpart F—General Provisions Relating to Employment Taxes (Chapter 25, Internal Revenue Code of 1954)
§ 31.3502-1 Nondeductibility of taxes in computing taxable income.