This is a steaming pile of legislation at its best. Totally dumbfounded here concerning a retroactive tax, but quick googling points out it is upheld by the courts the majority of the time to my dismay. This is assuming it is a property tax, not a sales tax since that was already paid. However this appears to be a wholly new tax about which I found this.
Retroactive Taxes | Chadbourne & Parke LLP
"The Court in later cases has clearly distinguished the two cases on the basis that they dealt with the “creation of a wholly new tax” and therefore “their authority is of limited value in assessing the constitutionality of subsequent amendments that bring about certain changes in operation of the tax laws.”24 Thus, while lack of notice is not dispositive, the Court has suggested that lack of notice may violate due process if the retroactive law creates a “wholly new tax.” "
I'm not versed in the subject and didn't stay at a Holiday Inn last night but there might be hope in the courts if anyone can survive long enough.
Retroactive Taxes | Chadbourne & Parke LLP
"The Court in later cases has clearly distinguished the two cases on the basis that they dealt with the “creation of a wholly new tax” and therefore “their authority is of limited value in assessing the constitutionality of subsequent amendments that bring about certain changes in operation of the tax laws.”24 Thus, while lack of notice is not dispositive, the Court has suggested that lack of notice may violate due process if the retroactive law creates a “wholly new tax.” "
I'm not versed in the subject and didn't stay at a Holiday Inn last night but there might be hope in the courts if anyone can survive long enough.