1.  Fiduciary adjustment defined.  The fiduciary adjustment is the net amount of the modifications described in section 5122, including subsection 3 if the estate or trust is a beneficiary of another estate or trust, that relates to items of income or deduction of an estate or trust. The following items, to the extent that they were deducted in calculating federal taxable income, must be added back to the fiduciary adjustment: income taxes imposed by this State or any other taxing jurisdiction; the amount of the qualified business income deduction determined under the Code, Section 199A; and interest or expenses incurred in the production of income exempt from tax under this Part. Interest or expenses incurred in the production of income taxable under this Part but exempt from federal income tax must be subtracted from the fiduciary adjustment.  

2.  Shares of fiduciary adjustment.  The respective shares of an estate or trust and its beneficiaries, including, solely for the purpose of this allocation, nonresident beneficiaries, in the fiduciary adjustment must be in proportion to their respective shares of federal distributable net income of the estate or trust. If the estate or trust has no federal distributable net income for the taxable year, the share of each beneficiary in the fiduciary adjustment must be in proportion to the beneficiary's share of the estate or trust income for that year, under local law or the terms of the instrument, that is required to be distributed currently and any other amounts of such income distributed in that year. Any balance of the fiduciary adjustment must be allocated to the estate or trust.  

3.  Alternate attribution of adjustment.  The assessor may authorize, upon the taxpayer's written request, the use of other methods of determining to whom the items comprising the fiduciary adjustment are attributed, as may be appropriate and equitable.