O.C.G.A. § 48-13-76 (2019)

(a) The corporate net worth tax imposed shall be due on the first day of the tax period. The annual tax period shall be the same as the annual tax period adopted by the corporation for state income tax purposes as provided by law. If a corporation does not return income taxes to this state, the tax period shall begin on January 1 and end on December 31 of each calendar year.

(b) The first tax period of a corporation coming into existence or otherwise becoming subject to the tax for the first time shall begin on the date of incorporation or of first becoming subject to the tax and shall end on the day immediately preceding the beginning of the regular annual tax period provided in subsection (a) of this Code section.