Sec. 20. (a) The department shall develop and maintain a property tax transparency portal on the department's current website through which taxpayers may:
(1) compare the property tax liability in their current tax statement compared to their potential property tax liability based on changes under a proposed tax rate; and
(2) provide taxpayer feedback to the department and local units.
(b) The department shall make the portal available for taxpayer use not later than January 1, 2026.