There is levied a tax on the privilege of engaging in the following vocations, professions, businesses, or occupations:

(1) Persons registered as lobbyists pursuant to § 3-6-302;
(2) Persons licensed or registered under title 48, chapter 1 as:

(A) Agents;
(B) Broker-dealers; and
(C) Investment advisers; and
(3) Persons licensed as attorneys by the supreme court of Tennessee.