The IRS has released RP 2008-48 that describes the circumstances under which the Internal Revenue Service will treat a child of parents who are divorced, separated, or living apart as the dependent of both parents for purposes of §§ 105(b),
106(a),132(h)(2)(B), 213(d)(5), 220(d)(2) and 223(d)(2) of the Internal Revenue Code when the custodial parent has not released the claim to the exemption for the child under § 152(e)(2).
Sec. 105(b) relates to excluding from gross income employer provided medical reimbursements. Sec. 106(a) relates to excluding from gross income employer provided health insurance. Sec. 132(h)(2)(B) relates to excluding from gross income certain employer fringe benefits. Sec. 213(d)(5) relates to certain deductions for medical expenses. Sec. 220(d)(2) & 223(d)(2) relates to excluding from gross income distributions from MSAs & HSAs used for medical expenses.