Tennessee Code Title 67. Taxes and Licenses § 67-1-1710

(a) In determining taxpayer liability of any professional practitioner licensed by this state, the commissioner shall have no authority to obtain access to legally privileged information, as provided for in § 23-3-105 or to confidential client information, as provided for in statute or professional rules, including the rules of the Tennessee supreme court. Confidential client information includes, but is not limited to, the identity of a client, the nature of the matter for which representation was sought, or any information obtained by counsel in the course of the client's representation.

(b) When the provisions of subsection (a) are asserted, the disclosure of any information shall be made only after a court order compelling disclosure of such information is final. In an action to compel such disclosure, the client affected by the disclosure has the right to intervene anonymously; any examination of the information shall be conducted in camera; and the commissioner shall have the burden of proof to show, by clear and convincing evidence, that the information sought is not privileged or confidential client information.