Thomas M. Comparini & Vicki Comparini v. Commissioner, 143 T.C. 274

Petitioners filed a whistleblower action under 26 U.S.C. § 7623(b)(4) seeking review of IRS determinations.
IRS Whistleblower Office processed petitioners’ Form 211 as four separate claims and denied them in 2012 letters.
Two 2012 letters to petitioners husband and two to petitioners wife stated no award was warranted; no final determination language appeared.
In January 2013 petitioners submitted additional information and new claims; the Office responded with a February 12, 2013 letter addressing claim 48.
Petition was filed March 12, 2013 (postmarked March 14) seeking review of the 2013 determination.
Question presented: whether the 2013 letter is a determination triggering jurisdiction under 7623(b)(4) and whether 2012 letters affect timely filing.

Issue	Plaintiff's Argument	Defendant's Argument	Held
Whether the 2013 letter constitutes a 7623(b)(4) determination.	petitioners	respondent	Yes; 2013 letter is a determination.
Whether 2012 letters affect the 2013 petition's timeliness.	petitioners	respondent	2013 petition timely under 7623(b)(4).
Whether the Office could issue more than one determination for a claim.	petitioners	respondent	Court has jurisdiction over the 2013 determination; not barred by Friedland precedent.
Whether the 2012 letters create ambiguity that would defeat jurisdiction.	petitioners	respondent	No; text of 2013 letter controls jurisdiction.

Cooper v. Commissioner, 135 T.C. 70 (2010) (determination may confer Tax Court jurisdiction under 7623(b)(4))
SECC Corp. v. Commissioner, 142 T.C. 225 (2014) (analysis of notices and determinations in whistleblower context)
Corbalis v. Commissioner, 142 T.C. 46 (2014) (finality and determination concepts in interest abatement context)
Craig v. Commissioner, 119 T.C. 252 (2002) (determination letters and CDP-like review framework)
Lunsford v. Commissioner, 117 T.C. 159 (2001) (notice-to-proceed/definitive action constructs jurisdictional triggers)