Louisiana Revised Statutes Tit. 47, § 287.651. Payment of tax

(1) The total amount of tax on a calendar year return imposed by this Part shall be paid on the fifteenth day of May following the close of the calendar year, or, if a calendar year return is filed before said due date, then the tax shall be paid when the return is filed; and, if the return is on the basis of a fiscal year, then the total amount of tax shall be paid on the fifteenth day of the fifth month following the close of the fiscal year, or, if a fiscal year return is filed before said due date, then the tax shall be paid when the return is filed.

(2) Notwithstanding the provisions of Paragraph (1) of this Subsection, the total amount of tax imposed by this Part on organizations described in I.R.C. Section 501 on a calendar year return shall be paid on the fifteenth day of June following the close of the calendar year, or, if a calendar year return is filed before said due date, then the tax shall be paid when the return is filed; and, if the return is on the basis of a fiscal year, then the total amount of tax shall be paid on the fifteenth day of the sixth month following the close of the fiscal year, or, if a fiscal year return is filed before said due date, then the tax shall be paid when the return is filed.

(3) The full amount of tax disclosed by the return as filed shall constitute an assessment at that time and shall be recorded as an assessment in the records of the secretary.