According to the Illinois Secretary of State (SOS) when one applies for a driver’s license they will be asked questions about their general health and will take vision, written and driving exams. You are allowed three attempts to pass each of these exams within one year from the date you paid your application fee.
So your daughter will have 3 chances to pass her driving test within one year. If she is unable to do so then you or she should check with the IL SOS to find out what she would need to do in order to obtain a driver's license.
In Illinois the driving exam allows a person to demonstrate their ability to drive. The driver must provide a vehicle that is licensed, properly equipped for the driver’s license classification they are seeking and complies with the Secretary of State’s vehicle condition standards.
If the vehicle is registered in Illinois, it must display valid license plates as required by Illinois law. If the vehicle is registered outside of Illinois, it must meet the registration requirements of the respective state. The vehicle, unless exempt, must comply with the Illinois Mandatory Insurance Law. Your daughter will be required to show proof of vehicle insurance at the Driver Services facility. She will automatically fail the exam if she violates any traffic law or commit any dangerous action while taking the exam. The driver and the examiner are required to wear safety belts during the driving exam, as required by law.