To change your registered agent in Illinois, you must complete and file a Statement of Change of Registered Agent form with the Illinois Secretary of State. The Illinois Statement of Change of Registered Agent must be submitted by mail or in person and costs $25 to file.
Most general maintenance can be completed electronically using MyTax Illinois which allows you to update legal and mailing address information, responsible party, owners/officers and members/managers (for Limited Liability Companies), contact information, and cease tax accounts.