Amends the Property Tax Code. Provides that no interest or penalties shall be imposed with respect to property that is included in a decedent's probate estate at the time of a delinquency if the representative of the decedent's estate applies with the county treasurer for a waiver of those amounts and is granted that waiver. Provides that the waiver shall apply beginning on the date of the decedent's death until the earlier of either: (i) the date on which the property is sold, transferred, or conveyed or (ii) the date on which the estate is closed.