26 C.F.R. § 1.643(a)-1 Deduction for distributions.
Title 26 - Internal Revenue
The deduction allowable to a trust under section 651 and to an estate or trust under section 661 for amounts paid, credited, or required to be distributed to beneficiaries is not allowed in the computation of distributable net income.
Title 26: Internal Revenue
PART 1—INCOME TAXES
Estates, Trusts, and Beneficiaries
§ 1.643(a)-1 Deduction for distributions.