The forms below are some of the most common forms used in the Domestic Relations Division, but there are many more. Illinois Legal Aid Online provides a guided interview called an Easy Form that will help you fill out the forms.Select "Cook County Attorney Code" in the drop down, click "Add Case Cross Reference Number" and then click "Save changes. All our forms are easily fillable and printable, you can even upload an existing document or build your own editable PDF from a blank document. Line 4 - Select the applicable legal structure. If you are completing a paper form, mail a completed form with applicable documentation to: Cook County Assessor. 118 N. Clark Street, Room 320. Forms are available for view in either or both of the following formats: Adobe Acrobat (pdf); MS Word for Windows (doc). Cook, Timothy D. Jan 20, 2005. 4.