unless the partnership or tiered partner can establish that a lower rate should apply, the partnership or tiered partner has made an election to be subject to tax under sections 6, 8, or 9 of this chapter, or to the extent the partnership, tiered partner, or the department can determine that the tax was otherwise properly reported and remitted. Such tax shall be considered to be due on the due date of the partnership's or tiered partner's return for the taxable year, determined without regard to extensions.
such report, amended statement, or other information shall be considered to have not been issued for purposes of this section.
IC 6-3-4.5-18