If you are missing an exemption on your second installment property tax bill, you can apply online for a Certificate of Error beginning Monday, July 1, 2024. The Portal consolidates information and delivers Cook County taxpayers a one-stop customer service website.Cook County Treasurer's Office 118 North Clark Street, Room 112 Chicago, Illinois 60602 (312) 443-5100 Fritz Kaegi, Cook County Assessor. To pay your Property Taxes, please click below to be taken to the website of the Cook County Treasurer. Duplicate or Overpayment Refund. Complete Form PTAX-203-B, Illinois Real Estate Transfer Declaration Supplemental Form B. 11 Full actual consideration. Do cities and towns in Massachusetts assess a personal property tax? The optional method allows you to deduct the mortgage interest and state and local real property taxes reported on Form 1098, Mortgage Interest Statement. If your domicile contains more than one dwelling unit, you will still be liable for any personal property you own in the rental units.