If you mean the Senior Citizens Tax Deferral Program, the paperwork appears to be available only through the Kane County Treasurer's office. They may not be available at the moment -- the due date for them is March 1.
"Forms may be picked up at the Treasurer's Office located at 719 Batavia Avenue, Building (A), in Geneva or they may be obtained by mail. People needing assistance or advice may contact Della Winckler at the Treasurer's Office at (630) 232-3565."
If your mean the Senior Citizen Homestead Exemption, this is the form
http://www.co.kane.il.us/SOA/SeniorCitizenHomestead.pdf
This answer was edited by Reader 22 days ago.
Reason: additional info

