Haw. Rev. Stat. § 231-53: Setoff against refund.

The State, through the department of accounting and general services or the department of taxation, upon request of a claimant agency, shall set off any valid debt due and owing a claimant agency by the debtor against any debtor's refund. Any amount of the refund in excess of the amount retained to satisfy the debt shall be refunded to the debtor.