For tax years beginning on or after January 1, 2009, a corporation subject to tax and engaged in a unitary business with one or more corporations subject to combination shall calculate its taxable net income derived from this unitary business as its share, attributable to the commonwealth, of the apportionable income or loss of the combined group engaged in the unitary business, determined in accordance with a combined report. In computing the apportionable income or loss of the combined group and of each member thereof, items of income, deductions and receipts from transactions between or among members of the combined group, including but not limited to the payment of dividends, shall be eliminated, subject to regulations as may be adopted pursuant to clause (i) of subsection (f).

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