Does anyone know the process to have my stepdad's license revoked?

looks like you have alot of great answers already. In Canada our easiest path is to contact the family Dr or eye Dr in confidence and report what's happened. Ask if they are willing to have a conversation about relinquishing his driver's license on his own.
I think what needs to be emphasized is what this means for your parent. Not having a license can be very anxiety producing as they don't know how they are going to maintain their sense of independence without it. Help your dad to create a plan so that he feels like he can still get around and it doesn't require calling you to come get him when he wants to run up the street to the store for something. When he see's a plan that can actual work he may be willing to give up his license more easily. My dad has mac deg and was willing to give up his license more easily because my mom was still driving, so she was his fall back plan. My mom now should be giving it up but doesn't want to because it means absolute loss of independence. We are exploring things like selling the car to create a cab slush fund, door delivery of groceries and medicines and take out, community services that pick up seniors and take them to outings and appointments.
Good luck, I know it's not easy.

If license was going to be suspended perhaps finding out what happened or not and getting that rectified.

Go to the DMV and find out what they need to suspend or revoke his license.

(copy and paste)
https://www.dmv.com/il/illinois/dmv-office?tg1=DVA&utm_content=dmv.com&utm_medium=dmv_&tg7=dmv_&utm_source=dmv.com&tg9=dmv.com&utm_term=organic_dmv&utm_campaign=organic_dmv

Contact the doctor and ask him/her to put a stop on him. Go to the Illinois State Patrol Office and notify them. Mom can call a tow-truck driver to move his truck to a storage facility (after you let the police not to put the vehicle on the stolen list if Dad reports it).

Talk to the doctor about Cognitive Skills Analysis DCAT Mobile
https://tirf.ca/wp-content/uploads/2017/01/MTO_cognitive_meta_6.pdfe

My husband just tested, it's a virtual driving test and it is understood that it was just step one in the inevitable license loss................it is a legal tool and no one's fault. Anger will erupt when the license is revoked, but that's what medication is for.

Please don't wait until someone suffers serious injury or death. Report him to your department of motor vehicles immediately. Tell them about the suspension that was not implemented. Tell them about his vision and his accidents. If you don't have POA get him to sign a HIPPAA waiver and have his eye doctor sign a note with the diagnoses. That will get his license revoked, or at least suspended pending a medical board review.

You must choose your battles and this is one you need to face immediately!

Go first to your DMV with POA and his drivers license in hand. See if they will cancel his license and give you a replacement ID card. Take that home with a blank set of keys for his key chain. Then you can lay down the law, say it's over, here's your new license for your wallet, DVM says no driving. Don't mention the blank keys, replace the real keys with the blanks, let him keep them in his pocket.

This is not easy, my 5' self stood toe to toe with my 6' husband in the driveway and said no damn way! This went on for over 2 months, every time we were going somewhere, I was in the drivers seat! He never drove again, and like someone else said he began to enjoy it after a bit. AND........ he never killed anyone! That's what you MUST keep in mind. Someone else's life, someone else's child!
Blessings for you and your family!

MJcaregiver23

Google DMV. There is a form you can print out and then fill out the form and mail it back. It may take a few weeks but your dad will get a notice from DMV regarding an appointment with a date, address, and time. Take your dad to the appointment and they will give him a driving test. If he fails, they revoke his license that day.

The form is called Request for Driver Review.

Then you will have to step in if he won't give up his driving rights. My mom still drove. She wouldn't stop even though we told her she could go to jail.

I so wish you luck. It was VERY hard to do this and I had to do it with both my parents.

There have been great responses here and I really can’t add to them except to say this: you are aware of the problem and, whether you are POA or not, you could be held legally liable if something were to happen. You must do whatever you can to get your step dad from behind the wheel. I have known people who were charged after fatal car crashes involving an at-fault elderly parent. I don’t know the laws in your state, but be aware that this could occur.

Sometimes the wheels of justice move slowly. Definitely slower after covid and many companies became okay with 'do the job when i can get to it' mentality.

How did he pay those three tickets? Contact that court and find out why they never put the suspension on his license. Call your DMV, explain the accident, and find out what has to happen to get the suspension. Call his doctors. Doctors who treat people for epilepsy report seizure activity to pull the license until the patient has gone x number of months without a seizure. Considering his eyesight and the recent wreck, would seem very likely the doctor who treats him for his sight could help to get a form to file and medical records to back it up.

Totally depends on the State that issued the license. Contact the Bureau of motor vehicle

The way I had my husband’s license revoked was through his eye doctor. They should know about degenerative process and peripheral loss. You can get them to both give you a letter and send one to DMV stating he should not be driving. His doctor can give the news instead of you. I’m sorry to hear he doesn’t recognize this even after an accident.

Contact your local senior center or local area services for seniors. Where I live in California, I have five different services. I voluntary stopped driving because I am 85 and was trying out some new medication and wasn't sure how I would react. These five services meet all my needs from going shopping, doctors visits, hospital visits, visiting family and friends, lunches out, movies, etc. Most local rides are between $1.00 and $2.50. My car insurance was about $90 a month and whatever gas or upkeep on the car I need. If I have to go over 20 miles or so it's between $17-$25. That's about a trip every day if I want. This does not include buses, taxies, etc. which of course, could be more money. All you have to do is think ahead to make a reservation a day ahead. You could also pay a friend or neighbor $10.00 to take you along when they go to shop. Independence is really not the issue here, many disabled and blind people can and do get around very well. If you were to rent a limo to go to a party and drink, you wouldn't think twice about it. It would be considered safe and a luxury. And it probably be more than your car insurance. Good Luck with new ideas.....

MJcaregiver23: Disable the auto by any means possible.

Sorry to say everybody is backlogged, have a work shortage, or failing in their attempt to multitask.
Suggestions: As a concerned person or caregiver
1. Go inquire on why his lisence was not suspended
2. Talk to his PCP and share your concern
If no one is willing to help, send a certified letter to the courts and to his doctor with a formal request for help. This will show a genuine concern for your stepfather and the public. Hopefully this will get the
ball rolling.

Get a "steering wheel security lock" immediately. The steering wheel will only be able to move a couple of inches if someone tries to drive with it locked in place.

Your stepfather sounds like he will continue to put innocent people's lives in jeopardy by driving sneakily even if he has no valid license or insurance, so get a steering wheel lock to which you keep the key ASAP.

https://www.autozone.com/alarm-and-security/security-lock

I suggest getting a "Club" for the steering wheel and you keep the keys. He won't be able to turn the steering wheel even if he has a key to start it. You'll still be able to use the car with minimal disruption or cost.
This should help until you can arrange for his license to be voided by his doctor or the DMV.

Don't give him anything to drink after 7pm
If he still has to go to the bathroom
Then try 6 pm
I stop drinking at 5 pm will sip a little water