Yes, you still have to fill out the form every single year.
Michigan business with $80,000 or less in fixtures, desks, computers etc., are STILL required to fill out the form to get their exemption. You must fill out the MI Treasury Form 5076 with your local assessing offices by Tuesday, Feb. 10, 2015. You can use the link to the affidavit form here.
Fill it out and for best results deliver by hand to your assessing office ASAP.
And remember, give em no more than is absolutely necessary.