Tex. Tax Code § 111.110

(a) Subject to the provisions of Subchapter D, Chapter 55, Education Code, the comptroller shall issue a credit to be used by a taxpayer who qualifies for the credit under that subchapter against the payment of a tax imposed on the taxpayer:

(1) for the franchise tax under Chapter 171; or

(2) if the taxpayer holds a direct payment permit for the sales and use tax under Chapter 151, for that tax.

(b) The credit applies to a tax originally due on or after the date the credit is issued but not later than the end of the 20th calendar year following the calendar year in which the credit was issued.

(c) A taxpayer may not claim a credit issued under this section in a calendar year in an amount greater than five percent of the total credit issued to that taxpayer.

(d) A taxpayer shall include with a return or report showing an amount of tax due against which a taxpayer claims a credit under this section, a statement containing the following information:

(1) the original amount of the credit and its date of issue;

(2) the total amount of the credit previously claimed by the taxpayer;

(3) the amount of credit claimed on the attached return;

(4) the remaining unused credit amount; and

(5) the calendar year in which the credit expires.

(e) The comptroller may recover an amount erroneously claimed as a credit in a jeopardy or deficiency determination issued before the fourth anniversary of the date on which the erroneous claim is filed.