MI HB4564

Adds exemption for machinery capable of simultaneously harvesting grain or crops and biomass, and machinery used solely for harvesting biomass.

Exempts agricultural land tile, subsurface irrigation pipe, portable grain bins, grain drying equipment and its fuel/energy source, and greenhouses when purchased by agricultural businesses for exempt agricultural purposes.

Exempts tangible personal property installed as component parts of agricultural structures (barns, shops) such as water supply, heating/cooling, lighting, and milking systems if they can be disassembled without affecting structural integrity.

Exempts sales of these agricultural items to contractors building, altering, or repairing real estate for others when affixed to real estate for exempt agricultural use.

Applies retroactively to all open tax periods but does not apply to refund claims filed before April 9, 2018; effective April 25, 2018.