Privately owned business has family working under the table for years and filing taxes improperly. They have bought land and put in under a family members name so that they can move the business and then sign it over to a relative so that they can file for bankruptcy and not have to pay back anything. Even though it will not be legally their company they will still be working and collecting money. Is this something big enough for me to report?
I would consider contacting the attorney general's office in Wisconsin. They will have a number of good resources to help you understand what options you have in terms of reporting something that concerns you.
You could also contact a good bankruptcy attorney to discuss what steps you might take if the above stated plan is implemented.
Legal disclaimer: I am licensed to practice law in the state of Washington and the answer provided above is for general information purposes only and should not be relied on as specific legal advice. This answer does not form an attorney-client relationship. You should consult with an attorney of your choice to fully advise you about your legal rights and obligations.