### Question
Can you define what 4-percent portion means?


### Answer
**4-percent portion** is defined as the following in *26 U.S.C. § 6601*:

> the lesser of—


(A) $345,800 reduced by the amount of the credit allowable under section 2010(a)

#### Citation:
  - *26 U.S.C. § 6601*
  - Heading: **Subtitle F-Procedure and Administration > CHAPTER 67-INTEREST > Subchapter A-Interest on Underpayments**

