Mich. Comp. Laws § 552.603b: Retroactive correction of support amount.

Sec. 3b.

If an individual who is required by the court to report his or her income to the court or the office of the friend of the court knowingly and intentionally fails to report, refuses to report, or knowingly misrepresents that income, after notice and an opportunity for a hearing, the court may retroactively correct the amount of support.