If you feel your home is improperly assessed, you are encouraged to file an appeal with the Cook County Assessor's Office. Complete Form PTAX-203-B, Illinois Real Estate Transfer Declaration Supplemental Form B. 11 Full actual consideration.This manual is meant to assist the Taxpayer in the basic preparation of the 7551 Real Property Transfer Tax Declaration. Form. Cook County property tax bills are available at cookcountytreasurer. Welcome to the Illinois Department of Revenue. Committed to excellence and working together to fund Illinois' future. The Personal Property Lease Transaction Tax applies to businesses or individuals that either are a lessor or lessee of personal property used in Chicago. Personal property is assessed every year and is calculated using original cost and then applying depreciation tables.