This memorandum addresses whether Mr. Dewey's daughter can be classified as a qualified child of his eldest son for tax purposes. It concludes that this is not permitted, as the son's adjusted gross income is not higher than the parents'. Generally, in order for another taxpayer to claim a qualifying child, their adjusted gross income must be greater than the parents' if the parents are eligible to claim the child but do not. As the son's income is lower in this case, he cannot claim the daughter as a qualified dependent.