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Senate bill · S. 4639 (119th Congress)

IRS Whistleblower Program Improvement Act

U.S. Senate

Latest action May 21, 2026

Sponsor: Chuck Grassley (U.S. Senator for Iowa, Republican)

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From Congress.gov and official rosters. This record was last updated Jul 30, 2026. About our data

Summary

Amends the Internal Revenue Code to allow de novo Tax Court review of whistleblower award determinations, based on the administrative record and any newly discovered or previously unavailable evidence.

AI summary. Not an official summary. How we handle summaries

Where it stands

Assigned to a committee for review.

  1. Introduced
  2. In committee
  3. Up for a vote
  4. Passed one chamber
  5. Passed
  6. Enacted

Committee

Senate Committee on Finance · U.S. Senate

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Cosponsors

3

Cosponsors listed on Congress.gov, shown A to Z.

  • Democratic2
  • Republican1

This bill has cosponsors from more than one party.

Shown in neutral colors by design; Agora is non-partisan.

Related bills

As identified by Congress.gov.

Full history

  1. May 21, 2026

    Introduced

    Introduced in U.S. Senate

    U.S. Senate

  2. May 21, 2026

    Referred to committee

    Read twice and referred to the Committee on Finance.

  3. May 21, 2026

    Referred to committee

    Read twice and referred to the Committee on Finance.

  4. May 21, 2026

    Referred to committee

    Read twice and referred to the Committee on Finance.

Read the record