You could try going to the state court website to see if there is a support order listed under your husband's name. You could also ask your husband to show you a copy of his credit report and see if a child support order is listed.
You could ask your husband for a copy of his wage statement and see what is being garnished and to whom the garnishment is being sent.
Disclaimer: This is not legal advice and shall not be relied on as legal advice. Answering this question does not create an attorney client relationship.