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IRS reporting requirements

CIC Servs. v. IRS

Updated Oct 22, 2026

In brief

The Anti-Injunction Act does not prevent a lawsuit challenging an IRS reporting rule merely because noncompliance can trigger a tax penalty.

Where it stands
Decided

Decided 9-0 · May 17, 2021 · Opinion by Justice Kagan

What it’s about
In a unanimous decision, the Supreme Court ruled that the Anti-Injunction Act does not prevent lawsuits challenging IRS regulatory mandates, such as reporting requirements, even if failing to comply results in a tax penalty.
Who it affects
Businesses and other taxpayers can challenge IRS reporting mandates without first violating the rule and paying a penalty. For example, a company facing a reporting requirement may bring a lawsuit over the rule itself.

Summary: written with AI from the case record.

Illustration for CIC Servs., LLC v. IRS
Conceptual illustration · AI-generated

What it's about

The Court determined that a suit contesting the legality of a regulation is not the same as a suit seeking to stop the collection of a tax.

The decision draws a line between challenges to administrative rules and lawsuits aimed at stopping the assessment or collection of taxes.

Question presented

Whether the Anti-Injunction Act’s bar on lawsuits “for the purpose of restraining the assessment or collection of any tax,” 26 U.S.C. § 7421(a), precludes challenges to IRS reporting requirements backed by tax penalties.

What the Court decided

Holding

A suit to enjoin Notice 2016–66 does not trigger the Anti-Injunction Act even though a violation of the Notice may result in a tax penalty. 925 F. 3d 247, reversed and remanded.

Result
Reversed

The vote

  • Joined the judgment
  • Wrote an opinion
Majority · 9joined the Court's opinion
  1. Kaganwrote the opinion
  2. Roberts
  3. Thomas
  4. Breyer
  5. Alito
  6. Sotomayoralso wrote separately
  7. Gorsuch
  8. Kavanaughalso wrote separately
  9. Barrett
9 justices joined the judgment.

What's next

The Court has finished its action in this case. Taxpayers challenging similar IRS regulatory mandates may seek to bring their claims without first paying a related penalty.

Documents

4

Docket activity

11
  • New analysis added

    Oct 22, 2026 · Court records

  • AI analysis generated: Impact Analysis

    Oct 22, 2026 · Generated

  • AI analysis generated: Opinion Summary

    Oct 22, 2026 · Generated

  • AI analysis generated: Decision Record

    Oct 22, 2026 · Generated

  • New analysis added

    Sep 3, 2026 · Court records

Show 6 more
  • AI analysis generated: Case Briefing

    Sep 3, 2026 · Generated

  • Case data updated: status, opinion_date

    Jul 25, 2026 · Court records

  • Opinion added: opinion

    May 17, 2021 · Court records

  • Brief added: Petition

    Jan 17, 2020 · Court records

  • Court Order added: Lower Court Orders/Opinions

    Oct 21, 2019 · Court records

  • Brief added: Questions Presented

    Court records

More questions

3
What did the Supreme Court rule in CIC Services v. IRS?
The Court said the Anti-Injunction Act does not bar lawsuits challenging IRS reporting requirements backed by tax penalties.
Who is affected by the CIC Services decision?
Businesses and taxpayers subject to IRS reporting mandates may challenge those rules without first violating them and paying a penalty.
What happens next in CIC Services v. IRS?
The Supreme Court has completed the case. Similar challenges to IRS regulatory requirements can proceed under the Court's interpretation.

Sources

Primary materials plus reporting. Best-effort analysis: this explainer relies on a mix of primary materials and trusted secondary sources. Official filings and opinions remain authoritative.

Checked Sep 3, 2026Methodology

Court records and filings

Reporting and analysis