Tex. Transportation Code § 502.1746

(a) When a person registers a motor vehicle under this chapter, the person is entitled to make a voluntary contribution in any amount to the fund for veterans' assistance established by Section 434.017, Government Code, as redesignated and amended by Chapter 1418 (H.B. 3107), Acts of the 80th Legislature, Regular Session, 2007.

(b) The county assessor-collector shall send any contribution made under this section to the comptroller for deposit in the state treasury to the credit of the fund for veterans' assistance before the 31st day after the date the contribution is made. A contribution made under this section may be used only for the purposes of the fund for veterans' assistance.

(c) The department shall:

(1) include space on each motor vehicle registration renewal notice, on the page that states the total fee for registration renewal, that allows a person renewing a registration to indicate the amount that the person is voluntarily contributing to the fund for veterans' assistance;

(2) provide an opportunity to contribute to the fund for veterans' assistance similar to the opportunity described by Subsection (a) and in the manner described by Subdivision (1) in any registration renewal system that succeeds the system in place on September 1, 2011; and

(3) provide an opportunity for a person to contribute to the fund for veterans' assistance during the registration renewal process on the department's Internet website.

(d) If a person makes a contribution under this section and does not pay the full amount of a registration fee, the county assessor-collector may credit all or a portion of the contribution to the person's registration fee.

(e) The department shall consult with the Texas Veterans Commission in performing the department's duties under this section.