Respuesta :

the answer would have to be Michigan. They had a flat income tax in 2009

Answer:

The correct answer is:

Michigan.

Michigan is the state that had a flat state income tax in 2009.

Step-by-step explanation:

A flat tax (short for flat-rate tax) is a tax system with a constant marginal rate, usually applied to individual or corporate income.

Flat tax benefits higher income brackets progressively due to decline in marginal value.

The state that had a flat state income tax in 2009 is:

Michigan.

Michigan is a flat-tax state that levies a state income tax of 4.25%