Iowa Code § 633.475

For the purpose of facilitating the speedy settlement and distribution of estates, the county treasurer of such county, by and with the consent of the board of supervisors may compromise and agree upon the amount of personal taxes at any time due or to become due the county from an estate, and payment in accordance with such compromise or agreement shall be for the satisfaction of all taxes in such estate matter. No compensation shall be allowed any person because of such compromise or agreement.