More businesses are voluntarily stepping forward with tax information, according to the state treasurer.
In January, the Michigan Department of Treasury received $8.1 million in funding to add 42 auditors and about 30 staff members on the collection side of the department.
It's searching for the underpayment of taxes in an enhanced effort to help with budget concerns.
The state treasurer says in the past, early retirement has affected the department's collection efforts.
State Treasurer Jay Rising says it's estimated the increase staff will help bring in $80 million this fiscal year and $120 million next fiscal year.