(a) To the extent excluded from federal taxable income, the amounts under this section are added to the federal taxable income of a corporation to determine Maryland modified income.

(b) The addition under subsection (a) of this section includes the net capital loss carryback, as defined in § 1212 of the Internal Revenue Code.

(c) The addition under subsection (a) of this section includes any taxes based on net income that are imposed by any state or by a political subdivision of any state.