Title 26
SECTION 20.6601-1
20.6601-1 Interest on underpayment, nonpayment, or extensions of time for payment, of tax.
§ 20.6601-1 Interest on underpayment, nonpayment, or extensions of time for payment, of tax.For regulations concerning interest on underpayments, etc., see § 301.6601-1 of this chapter (Regulations on Procedure and Administration).