Michigan Income / Franchise tax: New Law retroactively clarifies meaning of "tax year" for pre-2008 referenced years

H.B. 4709, signed by gov. 11/10/09. Effectively immediately and applicable retroactively for tax years beginning after December 31, 2007, new law clarifies that if the term "tax year" is used in reference to one or more previous or preceding tax years and the referenced tax years are before January 1, 2008, then those referenced tax years are deemed the same tax years during which the State's former single business tax (SBT) was in effect.