Tennessee Code Title 67. Taxes and Licenses § 67-4-2107

(a) Where a corporation doing business without surplus or undivided profits has had the value of its capital stock impaired by operating deficits or other business losses, such as fire, flood, tornado, or other natural disasters, and where such deficit or loss is carried upon the books and records of the corporation as an impairment of capital, the measure of the tax shall be diminished by such loss or deficit.

(b) If the capital stock of a corporation that is a subsidiary of another corporation or closely affiliated with another corporation by stock ownership is inadequate for its business needs apart from credit extended or indebtedness guaranteed by the parent or an affiliated corporation, in determining the amount of capital, surplus and undivided profit of such corporation with respect to its liability for the tax imposed by this part, there shall be included in the measure of the tax the indebtedness owed to or guaranteed by the parent or an affiliated corporation. If necessary to apportion such indebtedness, the methods of allocation set forth in this part shall be used.