Disallowed disqualified interest.

(12) Disallowed disqualified interest. The term disallowed disqualified interest means interest expense, including carryforwards, for which a deduction was disallowed under old section 163(j) (as defined in paragraph (b)(27) of this section) in the taxpayer's last taxable year beginning before January 1, 2018, and that was carried forward pursuant to old section 163(j).


26 CFR § 1.163(j)-1

Scoping language

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