Complete Form PTAX-203-B, Illinois Real Estate Transfer Declaration Supplemental Form B. 11 Full actual consideration. "Streamline your personal property transactions with our General Bill of Sale Form.Illinois Bill of Sale of Personal Property (Sold with Warranty). Property Tax Bill Assistance. Fritz Kaegi, Cook County Assessor. What is "real property" and what is "personal property"? What should I do if I have not received my property tax bill for the second installment? Cook County Treasurer's Office 118 North Clark Street, Room 112 Chicago, Illinois 60602 (312) 443-5100 Just click one of the links below to download or print our blank forms and legal documents. If you didn't find the document you need, contact us.