(a) This Chapter shall, until repealed, continue in full force and effect insofar as the levy of taxes is concerned and insofar as the collection of any tax levied hereunder and any action or proceeding for collecting such tax or enforcing any of the provisions of this Chapter are concerned. It shall continue in full force and effect until any tax levied in the aforesaid period is fully paid and any suit or prosecution for the collection of such tax or for the punishment of any violation of this Chapter has been fully terminated, subject to the limitations in sections 880.11 and 880.12.
(b) Annual returns for the last year, or portion thereof, in which this tax is levied shall be filed within four (4) months from the last day such levy ends. Any tax shown due thereon which is not paid and collected under the provisions of section 880.06 or 880.07 shall be paid with such annual return, except in those cases in which the time for filing returns and/or paying taxes due has been extended in accordance with section 880.05.