Ala. Code § 40-25-26

The Department of Revenue shall administer and enforce the taxes imposed by this article. It shall have the power to enter upon the premises of any taxpayer and to examine, or cause to be examined, by any agent or representative designated by it for that purpose, any books, papers, records, or memoranda, etc., bearing upon the amount of taxes payable, and to secure other information directly or indirectly concerned in the enforcement of this article.