(a) If the final determination of an appeal that decreases a property owner’s tax liability occurs after the property owner has paid his taxes, the taxing unit shall refund to the property owner the difference between the amount of taxes paid and amount of taxes for which the property owner is liable.
(b) For a refund made under this section, the taxing unit shall include with the refund interest on the amount refunded calculated at an annual rate of 9.5 percent, calculated from the delinquency date for the taxes until the date the refund is made.

(b-1) A taxing unit may not send a refund made under this section before the earlier of:
(1) the 21st day after the final determination of the appeal; or
(2) the date the property owner files the form prescribed by Subsection (i) with the taxing unit.
(c) Notwithstanding Subsection (b), if a taxing unit does not make a refund, including interest, required by this section before the 60th day after the date the chief appraiser certifies a correction to the appraisal roll under § 42.41, the taxing unit shall include with the refund interest on the amount refunded at an annual rate of 12 percent, calculated from the delinquency date for the taxes until the date the refund is made. A refund is not considered made under this section until sent to the proper person as provided by this section.
(d) A property owner who prevails in a suit to compel a refund, including interest, required by this section that is filed on or after the 180th day after the date the chief appraiser certifies a correction to the appraisal roll is entitled to court costs and reasonable attorney’s fees.
(e) Except as provided by Subsection (f) or (g), a taxing unit shall send a refund made under this section to the property owner.
(f) The final judgment in an appeal under this chapter may designate to whom and where a refund is to be sent.
(g) If a form prescribed by the comptroller under Subsection (i) is filed with a taxing unit before the 21st day after the final determination of an appeal that requires a refund be made, the taxing unit shall send the refund to the person and address designated on the form.
(h) A separate form must be filed with a taxing unit under Subsection (g) for each appeal to which the property owner is a party. A form may be revoked in a written revocation filed with the taxing unit by the property owner.
(i) The comptroller shall prescribe the form necessary to allow a property owner to designate the person to whom a refund must be sent. The comptroller shall include on the form a space for the property owner to designate to whom and where the refund must be sent and provide options to mail the refund to:
(1) the property owner;
(2) the business office of the property owner’s attorney of record in the appeal; or
(3) any other individual and address designated by the property owner.
(j) A property owner is not entitled to a refund under this section resulting from the final determination of an appeal of the denial of an exemption under § 11.31, wholly or partly, unless the property owner is entitled to the refund under Subsection (a) or has entered into a written agreement with the chief appraiser that authorizes the refund as part of an agreement related to the taxation of the property pending a final determination by the Texas Commission on Environmental Quality under § 11.31.
(k) Not later than the 10th day after the date a property owner and the chief appraiser enter into a written agreement described by Subsection (j), the chief appraiser shall provide to each taxing unit that taxes the property a copy of the agreement. The agreement is void if a taxing unit that taxes the property objects in writing to the agreement on or before the 60th day after the date the taxing unit receives a copy of the agreement.