26 C.F.R. § 1.706-2T
Temporary regulations; question and answer under the Tax Reform Act of 1984
Question 1: For purposes of section 706(d), how is an otherwise deductible amount that is deferred under section 267(a)(2) treated?
Answer 1: In the year the deduction is allowed, the deduction will constitute an allocable cash basis item under section 706(d)(2)(B)(iv).