(a) A person is entitled to a credit against the use tax imposed by a county commission pursuant to this article on the use of tangible personal property, custom software or the results of a taxable service in the county equal to the amount, if any, of sales tax lawfully paid to another county for the acquisition of that tangible personal property, custom software or taxable service. However, the amount of credit allowed may not exceed the amount of use tax imposed on the use of the property or service in the county of use and no credit may be allowed for payment of county special district excise taxes imposed pursuant to article twenty-two of this chapter.
(b) For purposes of this section:
(1) "County" means a county in this state or a comparable unit of local government in another state;