Amends the Property Tax Code. In counties with fewer than 3,000,000 inhabitants, provides that property that receives an erroneous homestead exemption for the current assessment year or for any of the 3 prior assessment years may be considered omitted property. Provides for penalties and interest to be imposed on that omitted property. Provides that any arrearage of taxes or interest that might have been assessed against that omitted property shall not be chargeable to certain bona fide purchasers of the property. Effective immediately.