Image via Wikipedia(B) Child’s share
A child’s share of any allocable parental tax of a parent shall be equal to an amount which bears the same ratio to the total allocable parental tax as the child’s net unearned income bears to the aggregate net unearned income of all children of such parent to whom this subsection applies.
(C) Special rule where parent has different taxable year
Except as provided in regulations, if the parent does not have the same taxable year as the child, the allocable parental tax shall be determined on the basis of the taxable year of the parent ending in the child’s taxable year.
