For the purposes of this section, where a civil judgment has been entered or a settlement made with respect to a violation of the antitrust laws and a criminal proceeding is based upon the same violation, the criminal proceeding need not have been brought prior to the civil judgment or settlement. If, in his return for any taxable year, a taxpayer claims a deduction for an amount paid or incurred with respect to a judgment or settlement described in the first sentence of this paragraph and is subsequently convicted of a violation of the antitrust laws which makes a portion of such amount unallowable, then the taxpayer shall file an amended return for such taxable year on which the amount of the deduction is appropriately reduced. Attorney's fees, court costs, and other amounts paid or incurred in connection with a controversy under such section 4 which meet the requirements of section 162 are deductible under that section. For purposes of subparagraph (2) of this paragraph, the amount paid or incurred in settlement shall not include amounts attributable to the plaintiff's costs of suit and attorney's fees, to the extent that such costs or fees have actually been paid.
$10,000 + [($85,000-$10,000) ÷ 3]
26 C.F.R. §1.162-22