The department or a county child support agency under s. 59.53 (5) may, to the extent permitted under federal law, disclose information obtained under sub. (2m) to the department of revenue for the purposes of locating persons, or the assets of persons, who have failed to file tax returns, who have underreported their taxable income or who are delinquent taxpayers, identifying fraudulent tax returns or providing information for tax-related prosecutions.