(1) an item was included in gross income for a prior taxable year (or years) because it appeared [at the time the income was received] that the taxpayer had an unrestricted right to such item;
(2) a deduction is allowable for the [current] taxable year because it was established after the close of such prior taxable year (or years) that the taxpayer did not have an unrestricted right to such item or to a portion of such item; and
(3) the amount of such deduction exceeds $3,000.
Amounts allowable under section 2053 or 2054 as a deduction in computing the taxable estate of a decedent shall not be allowed as a deduction . . . in computing the taxable income of the estate or of any other person, unless there is filed . . . a statement that the amounts have not been allowed as deductions under section 2053 or 2054 and a waiver of the right to have such amounts allowed at any time as deductions under section 2053 or 2054.
[I]f a claim of liability or non-liability relating to a particular tax year is litigated, a judgment on the merits is res judicata as to any subsequent proceeding involving the same claim and the same tax year. But if the later proceeding is concerned with a similar . . . claim relating to a different tax year, the prior judgment acts as a collateral estoppel only as to those matters in the second proceeding which were actually presented and determined in the first suit.
Subsection (a) of § 1341 provides that "if" three requirements are met, "then" the taxpayer is entitled to preferential treatment under [ § 1341]. 26 U.S.C. § 1341(a) (emphasis added). One of those requirements is that "a deduction" be "allowable for the taxable year because it was established after the close of such prior taxable year . . . that the taxpayer did not have an unrestricted right to such item. . .." 26 U.S.C. § 1341(a)(2). The provision itself does not indicate whether a deduction should be allowable. That answer must be found in another provision of the code. . . . The regulations interpreting this provision confirm this conclusion.
The amount of any deduction specified in section 162, 163, 164, 212, or 611 . . . or credit specified in section 27 . . . , in respect of a decedent which is not properly allowable to the decedent in respect of the taxable period in which falls the date of his death, or a prior period, shall be allowed . . . in the taxable year when paid . . . to the estate of the decedent.
Real Estate Sale is Ordinary Income