(a) A donor is allowed as a credit against the tax imposed by Chapter 11 of this title an amount not to exceed $10,000 of unreimbursed expenses specified in subsection (b) of this section if, while living, the taxpayer or a dependent of the taxpayer donates 1 or more human organs, or a part thereof, or bone marrow, to another human for human organ transplantation. Notwithstanding anything in Chapter 11 of this title to the contrary, unreimbursed expenses claimed by a donor as a credit against tax as allowed in this chapter may not be included as itemized deductions for the donor as otherwise allowable under Chapter 11 of this title.
(b) The tax credit allowed under this section may be claimed for:
(1) Medical, travel, and lodging expenses paid by the donor to the extent such expenses are reasonable in amount, related to the donation, and not reimbursable by the donor.
(2) The donor's lost wages related to the donation, net of any amounts paid or payable to the donor relating to the transplantation including amounts paid by the employer for traditional paid time off, paid by the employer for other than traditional paid time off, and under Chapters 23 and 37 of Title 19 or any policy of insurance.
(c) The tax credit allowed under this section must be claimed in the taxable year in which the human organ transplantation occurs. Notwithstanding anything to the contrary under this title, to the extent that expenses specified in subsection (b) of this section are incurred in the previous taxable year, such expenses must be claimed in the taxable year in which the human organ transplantation occurred. In circumstances where expenses specified in subsection (b) of this section are incurred within 12 months after the human organ transplantation occurred, such expenses may be taken in the taxable year incurred, provided that the aggregate credit allowable under this chapter for any 1 human organ transplantation does not exceed $10,000.
(d) Notwithstanding anything in this section to the contrary, for any taxable year, the total credit allowable for a donor under this section may not exceed $10,000.
(e) To the extent a taxpayer's tax credits pursuant to this section exceed any amounts otherwise due for the taxes listed under subsection (a) of this section, such unused credits shall be paid to the taxpayer in the nature of tax refunds.