§ 2058. State death taxes
(a)
Allowance of deduction
For purposes of the tax imposed by section
2001, the value of the taxable estate shall be determined by deducting from the value of the gross estate the amount of any estate, inheritance, legacy, or succession taxes actually paid to any State or the District of Columbia, in respect of any property included in the gross estate (not including any such taxes paid with respect to the estate of a person other than the decedent).
(b)
Period of limitations
The deduction allowed by this section shall include only such taxes as were actually paid and deduction therefor claimed before the later of—
(2)
if—
(A)
a petition for redetermination of a deficiency has been filed with the Tax Court within the time prescribed in section
6213
(a), the expiration of 60 days after the decision of the Tax Court becomes final,
(B)
an extension of time has been granted under section
6161 or
6166 for payment of the tax shown on the return, or of a deficiency, the date of the expiration of the period of the extension, or
(C)
a claim for refund or credit of an overpayment of tax imposed by this chapter has been filed within the time prescribed in section
6511, the latest of the expiration of—
(i)
60 days from the date of mailing by certified mail or registered mail by the Secretary to the taxpayer of a notice of the disallowance of any part of such claim,