Chapter 67. INTEREST

• SUBCHAPTER A [§ 6601 - § 6603] - Interest on Underpayments
• SUBCHAPTER B [§ 6611 - § 6612] - Interest on Overpayments
• SUBCHAPTER C [§ 6621 - § 6622] - Determination of Interest Rate; Compounding of Interest
• SUBCHAPTER D [§ 6631 - § 6631] - Notice Requirements