§609. Due date, payment, and reporting of tax

            A. The tax levied by this Chapter is for the annual accounting period, fiscal, or calendar year, regularly used by the taxpayer in keeping its books, with no proration for a portion of the year in the case of dissolution of domestic corporations or withdrawal from the state by foreign corporations, or where a corporation otherwise ceases to become taxable under this Chapter. The tax is due on the first day of each calendar or fiscal year and annually thereafter and is computed on the basis of the previous calendar or fiscal year closing. The tax is payable to the secretary on or before the fifteenth day of the fourth month following the month in which the tax is due. However, if the day on which the tax is payable falls on a Saturday, Sunday, or legal holiday, the tax shall be payable on the next business day. With its payment the taxpayer shall deliver to the secretary a full, accurate, and complete report and statement signed by a duly authorized official of the corporation, containing such information as the secretary may require.

            B. If permission is granted to change the corporate accounting period as provided in R.S. 47:613, the corporation shall file a return for the period from the end of the twelve-month period for which the tax had become due to the first fiscal closing of the new accounting period. The tax to be paid in this case shall be based on the preceding fiscal closing and shall be computed by multiplying the ratio that the number of months from the closing date under the prior accounting period to the closing of the new accounting period bears to twelve, times the tax as computed on the yearly basis. Subsequent returns will be filed on the basis of the new accounting period in accordance with the provisions of this Section.

            Acts 1991, No. 368, §1, eff. July 6, 1991; Acts 2005, 1st Ex. Sess., No. 27, §1, eff. Nov. 29, 2005; Acts 2008, 2^nd Ex. Sess., No. 10, §2, eff. May 13, 2008, for taxable periods beginning on or after Jan. 1, 2011; Acts 2016, No. 661, §1, eff. June 17, 2016.