26 U.S.C. § 7481
Date when Tax Court decision becomes final
Upon the expiration of the time allowed for filing a notice of appeal, if no such notice has been duly filed within such time; or
Upon the expiration of the time allowed for filing a petition for certiorari, if the decision of the Tax Court has been affirmed or the appeal dismissed by the United States Court of Appeals and no petition for certiorari has been duly filed; or
Upon the denial of a petition for certiorari, if the decision of the Tax Court has been affirmed or the appeal dismissed by the United States Court of Appeals; or
Upon the expiration of 30 days from the date of issuance of the mandate of the Supreme Court, if such Court directs that the decision of the Tax Court be affirmed or the appeal dismissed.
If the Supreme Court directs that the decision of the Tax Court be modified or reversed, the decision of the Tax Court rendered in accordance with the mandate of the Supreme Court shall become final upon the expiration of 30 days from the time it was rendered, unless within such 30 days either the Secretary or the taxpayer has instituted proceedings to have such decision corrected to accord with the mandate, in which event the decision of the Tax Court shall become final when so corrected.
As used in this section, the term “mandate”, in case a mandate has been recalled prior to the expiration of 30 days from the date of issuance thereof, means the final mandate.
The decision of the Tax Court in a proceeding conducted under section 7436(c) or 7463 shall become final upon the expiration of 90 days after the decision is entered.
Notwithstanding subsection (a), if, within 1 year after the date the decision of the Tax Court becomes final under subsection (a) in a case to which this subsection applies, the taxpayer files a motion in the Tax Court for a redetermination of the amount of interest involved, then the Tax Court may reopen the case solely to determine whether the taxpayer has made an overpayment of such interest or the Secretary has made an underpayment of such interest and the amount thereof.
If the Tax Court determines under this subsection that the taxpayer has made an overpayment of interest or that the Secretary has made an underpayment of interest, then that determination shall be treated under section 6512(b)(1) as a determination of an overpayment of tax. An order of the Tax Court redetermining interest, when entered upon the records of the court, shall be reviewable in the same manner as a decision of the Tax Court.
1997—Subsec. (b). Pub. L. 105–34, § 1454(b)(3), substituted “section 7436(c) or 7463” for “section 7463”.
Subsec. (c). Pub. L. 105–34, § 1452(a), reenacted heading without change and amended text generally. Prior to amendment, text read as follows: “Notwithstanding subsection (a), if—
“(1) an assessment has been made by the Secretary under section 6215 which includes interest as imposed by this title,
“(2) the taxpayer has paid the entire amount of the deficiency plus interest claimed by the Secretary, and
“(3) within 1 year after the date the decision of the Tax Court becomes final under subsection (a), the taxpayer files a petition in the Tax Court for a determination that the amount of interest claimed by the Secretary exceeds the amount of interest imposed by this title,
then the Tax Court may reopen the case solely to determine whether the taxpayer has made an overpayment of such interest and the amount of any such overpayment. If the Tax Court determines under this subsection that the taxpayer has made an overpayment of interest, then that determination shall be treated under section 6512(b)(1) as a determination of an overpayment of tax. An order of the Tax Court redetermining the interest due, when entered upon the records of the court, shall be reviewable in the same manner as a decision of the Tax Court.”
1988—Subsec. (a). Pub. L. 100–647, § 6247(b)(2), substituted “subsections (b), (c), and (d)” for “subsections (b) and (c)”.
Pub. L. 100–647, § 6246(b)(2), substituted “subsections (b) and (c)” for “subsection (b)”.
Subsec. (c). Pub. L. 100–647, § 6246(a), added subsec. (c).
Subsec. (d). Pub. L. 100–647, § 6247(a), added subsec. (d).
1976—Subsec. (a)(3)(A), (B)(iii). Pub. L. 94–455 struck out “or his delegate” after “Secretary”.
1969—Pub. L. 91–172 designated existing provisions as subsec. (a), inserted reference to the exception provided for in subsec. (b), substituted “notice of appeal” for “petition for review” in par. (1), and substituted references to dismissal of appeal for references to dismissal of petition for review in par. (2), and added subsec. (b).
Pub. L. 105–34, title XIV, § 1452(b),
Amendment by section 1454(b)(3) of Pub. L. 105–34 effective
Amendment by section 6246(a), (b)(2) of Pub. L. 100–647 applicable to assessments of deficiencies redetermined by the Tax Court made after
Amendment by section 6247(a), (b)(2) of Pub. L. 100–647 effective with respect to Tax Court cases for which the decision is not final on
Amendment by Pub. L. 91–172 effective 30 days after