IRS reporting requirements
CIC Servs. v. IRS
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.

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
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
Docket activity
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More questions
- 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.