Definitions.

“Return” means a return that would show the tax properly due.

“Tax shown on the return” and “tax for the taxable year” mean the net taxes imposed under s. 71.23 (1) or (2) after reduction for credits against those taxes but before reduction for amounts paid as estimated tax under this section plus the surcharge imposed under s. 77.93 before reduction for amounts paid as estimated tax under this section for that surcharge.

“Virtually exempt entity” means any entity, other than a corporation, that is subject to a tax under this chapter on unrelated business taxable income as defined under section 512 of the internal revenue code.