Note A public utility that is a corporation may be in a combined group for taxable years beginning on or after January 1, 2009. See s. Tax 2.61(2) for a description of corporations required to use combined reporting.
Wis. Admin. Code Department of Revenue Tax 2.50
Public utilities that are in combined groups must adjust the numerator and denominator of the sales factor as described in s. Tax 2.61(7).
The provisions of s. Tax 2.50 first apply for taxable years beginning on January 1, 2005.
Section Tax 2.50 interpretss. 71.04(8) (b) and (c) and 71.25(10) (b) and (c), Stats.