§ 7481.
(a)
Reviewable decisions
(1)
Timely notice of appeal not filed
(2)
Decision affirmed or appeal dismissed
(A)
Petition for certiorari not filed on time
(B)
Petition for certiorari denied
(C)
After mandate of Supreme Court
(3)
Decision modified or reversed
(A)
Upon mandate of Supreme Court
(B)
Upon mandate of the Court of Appeals
If the decision of the Tax Court is modified or reversed by the United States Court of Appeals, and if—
(i)
the time allowed for filing a petition for certiorari has expired and no such petition has been duly filed, or
(ii)
the petition for certiorari has been denied, or
(iii)
the decision of the United States Court of Appeals has been affirmed by the Supreme Court, then the decision of the Tax Court rendered in accordance with the mandate of the United States Court of Appeals shall become final on the expiration of 30 days from the time such decision of the Tax Court was rendered, unless within such 30 days either the Secretary or the taxpayer has instituted proceedings to have such decision corrected so that it will accord with the mandate, in which event the decision of the Tax Court shall become final when so corrected.
(4)
Rehearing
If the Supreme Court orders a rehearing; or if the case is remanded by the United States Court of Appeals to the Tax Court for a rehearing, and if—
(A)
the time allowed for filing a petition for certiorari has expired and no such petition has been duly filed, or
(B)
the petition for certiorari has been denied, or
(C)
the decision of the United States Court of Appeals has been affirmed by the Supreme Court,
then the decision of the Tax Court rendered upon such rehearing shall become final in the same manner as though no prior decision of the Tax Court has been rendered.
(5)
Definition of “mandate”
(d)
Decisions relating to estate tax extended under section 6166
If with respect to a decedent’s estate subject to a decision of the Tax Court—
(1)
the time for payment of an amount of tax imposed by chapter 11 is extended under section 6166, and
(2)
there is treated as an administrative expense under section 2053 either—
(A)
any amount of interest which a decedent’s estate pays on any portion of the tax imposed by section 2001 on such estate for which the time of payment is extended under section 6166, or
(B)
interest on any estate, succession, legacy, or inheritance tax imposed by a State on such estate during the period of the extension of time for payment under section 6166,
then, upon a motion by the petitioner in such case in which such time for payment of tax has been extended under section 6166, the Tax Court may reopen the case solely to modify the Court’s decision to reflect such estate’s entitlement to a deduction for such administration expenses under section 2053 and may hold further trial solely with respect to the claim for such deduction if, within the discretion of the Tax Court, such a hearing is deemed necessary. An order of the Tax Court disposing of a motion under this subsection shall be reviewable in the same manner as a decision of the Tax Court, but only with respect to the matters determined in such order.
([Aug. 16, 1954, ch. 736], [68A Stat. 889]; [Pub. L. 91–172, title IX, § 960(h)(1)], Dec. 30, 1969, [83 Stat. 734]; [Pub. L. 94–455, title XIX, § 1906(b)(13)(A)], Oct. 4, 1976, [90 Stat. 1834]; [Pub. L. 100–647, title VI], §§ 6246(a), (b)(2), 6247(a), (b)(2), Nov. 10, 1988, [102 Stat. 3751], 3752; [Pub. L. 105–34, title XIV], §§ 1452(a), 1454(b)(3), Aug. 5, 1997, [111 Stat. 1054], 1057.)