For purposes of this subsection, interest on any of the following obligations is not included in shareholders’ income: 1. Interest on federal obligations. 2. Interest on obligations issued under s. 66.0304 by a commission if the bonds or notes are used to fund multifamily affordable housing projects or elderly housing projects in this state, and the Wisconsin Housing and Economic Development Authority has the authority to issue its bonds or notes for the project being funded, or if the bonds or notes are used by a health facility, as defined in s. 231.01 (5), to fund the acquisition of information technology hardware or software, in this state, and the Wisconsin Health and Educational Facilities Authority has the authority to issue its bonds or notes for the project being funded, or if the bonds or notes are issued to fund a redevelopment project in this state or a housing project in this state, and the authority exists for bonds or notes to be issued by an entity described under s. 66.1201, 66.1333, or 66.1335. 3. Interest on obligations issued under s. 66.0621 by a local professional baseball park district, a local professional football stadium district, or a local cultural arts district. 4. Interest on obligations issued under ss. 66.1201, 66.1333, and 66.1335. 5. Interest on obligations issued under s. 234.65 to fund an economic development loan to finance construction, renovation or development of property that would be exempt under s. 70.11 (36). 6. Interest on obligations issued under subch. II of ch. 229.

The proportionate share of the net loss of a tax-option corporation shall be attributed and made available to shareholders on a Wisconsin basis but subject to the limitation and carry-over rules as prescribed by section 1366 (d) of the Internal Revenue Code. Net operating losses of the corporation to the extent attributed or made available to a shareholder may not be used by the corporation for further tax benefit. For purposes of computing the Wisconsin adjusted gross income of shareholders, tax-option items shall be reported by the shareholders and those tax-option items, including capital gains and losses, shall retain the character they would have if attributed to the corporation, including their character as business income. In computing the tax liability of a shareholder, no credit against gross tax that would be available to the tax-option corporation if it were a nontax-option corporation may be claimed.