(a) The excise and privilege tax imposed by this article shall terminate on October 1, 2021, unless extended by an act of the Legislature of the State of Alabama.
(b) For fiscal year beginning October 1, 2011, the tax shall apply to all severance of coal from October 1, 2011, through August 1, 2012, as well as the severance of coal after August 1, 2012.
(c) No later than August 20, 2012, each producer shall file a report with the commissioner setting forth the tons of coal severed for each month from October 2011 through July 2012. No later than the same date, the producer shall remit the full amount of tax levied by Act 2012-386 for the tons of coal severed during such months.
(d) Any taxpayer who, prior to the required date, voluntarily reported the production for the months from October 2011 until August 1, 2012, shall not be required to make additional reports. Any voluntary payments made by such producer for the months prior to the date required for making the tax payment, shall be credited to the producer's tax liability for the periods. No interest or credits, in excess of the amounts actually paid, shall be allowed to any such producer who voluntarily paid such taxes prior to the required due date.
(e) No penalties or interest shall be assessed for the tax return or payment related to this tax for the periods from October 2011 through August 1, 2012, if the return is filed and the payment is remitted as required by August 20, 2012