If you need to submit more than one CSV file, you must make more than one submission. Click "Import" and select the file on your computer.Filing, is a procss of submitting documnts to a court or govrnmnt agncy. Learn about eFileIL from the office of the Illinois Courts. Form REG-1, Illinois Business Registration Application, to us at the address on the form (Form REG-1 is available on our web site as a fill-in and savable form. Learn how to File on an Existing Case in the Courts for the State of Illinois and electronically serve (eserve) parties relevant documents. Is one witness slip enough for both committee hearings since it's the same bill? No. You will need to submit a witness slip for each committee hearing posted. Efiling is required for most civil cases in Illinois. Submitting Petitions.