Georgia Code Title 48. Revenue and Taxation § 48-8-42

(a) This article shall not apply with respect to the use, consumption, distribution, or storage of tangible personal property in this state upon which a like tax equal to or greater than the amount imposed by this article has been paid in another state. The proof of payment of the tax shall be determined according to rules and regulations made by the commissioner. If the amount of tax paid in another state is less than the amount of tax imposed by this article, the dealer shall pay to the commissioner an amount sufficient to make the tax paid in the other state and in this state equal to the amount imposed by this article.

(b) Except as provided in this subsection, no credit shall be given under this Code section for taxes paid in another state if the other state does not grant like credit for taxes paid in this state. Credit in the amount of tax actually paid in a state which does not grant like credit for taxes paid in this state shall be given up to the amount of the like tax due in this state only with respect to any use in the other state of tangible personal property by a manufacturer or fabricator in fulfillment of a bona fide written contract to furnish the property and perform services relative to the property in the other state when the property was manufactured or fabricated in this state exclusively for use by the manufacturer or fabricator as a contractor in fulfillment of the contract.