§6204 — Supplemental assessments

5 cases·2 followed·3 cited40% support

(a)General rule

The Secretary may, at any time within the period prescribed for assessment, make a supplemental assessment whenever it is ascertained that any assessment is imperfect or incomplete in any material respect.

(b)Restrictions on assessment

For restrictions on assessment of deficiencies in income, estate, gift, and certain excise taxes, see section 6213.

  • Treas. Reg. §Treas. Reg. §301.6204-1 Supplemental assessments

5 Citing Cases

Juliet R. El, Petitioner T.C. Memo. 2026-17 · 2026

ability, thereby permitting a supplemental assessment. See United States v. Frontone, 383 F.3d 656, 658–59 (7th Cir. 2004); LaRosa, 163 T.C. at 40 (citing Greer v. Commissioner, 557 F.3d 688, 691 (6th Cir. 2009), aff’g T.C. Memo. 2007-119); see also § 6204; Treas. Reg. § 301.6204-1. But see Bilzerian v. United States, 86 F.3d 1067, 1069 (11th Cir. 1996) (per curiam). In contrast, since nonrebate refunds do not fit within the definition of a deficiency provided by section 6211, the Commissioner i

Moxon Corporation, Petitioner 165 T.C. No. 2 · 2025

114, 122 (2004) (first citing § 6201; then citing § 6203; then citing § 6204; and then citing Statement of Procedural Rules, 26 C.F.R.

United States v. Frontone 383 F.3d 646 · Cir.
United States of America, Creditor-Appellant v. John F. Frontone and Kathleen M. Frontone, Debtors-Appellees 383 F.3d 656 · Cir.
Michael v. Commissioner 133 T.C. 237 · 2009

New cases, delivered.

Get notified when new Tax Court opinions drop.