Administration.

The Wisconsin adjusted basis of any investment for which a credit is claimed under par. (b) shall be reduced by the amount of the credit that is offset against Wisconsin income taxes. The Wisconsin basis of a partner’s interest in a partnership, a member’s interest in a limited liability company, or stock in a tax-option corporation shall be adjusted to reflect adjustments made under this subdivision.

Except as provided under s. 238.15 (3) (d), for investments made after December 31, 2007, if an investment for which a claimant claims a credit under par. (b) is held by the claimant for less than 3 years, the claimant shall pay to the department, in the manner prescribed by the department, the amount of the credit that the claimant received related to the investment.