Can you avoid responsibility for 18 year old driver?

Once your daughter turns 18, she becomes responsible for her own accidents. If the car she is driving is registered to you (either you alone or with someone else) you can be held responsible under the Vehicle Code as the owner of the car, up to limits of $15,000 per person/$30,000 per accident, regardless of whether you had anything to do with the accident. However, if you are NOT the registered owner of the car and she gets into an accident as a driver and she is at fault, you cannot be held liable as her parent, even if you share the same insurance policy. To be clear, the insurance policy does NOT determine liability. There can be any number of people on a policy, when one of them has an accident the others cannot be held liable solely because they are on the same policy. It also does not matter if she is living in your home. As an adult, she is responsible.

18 or not, the only liability you have is as the vehicle owner and is only up to $15k, unless you have knowledge of their unfitness as a driver. However, if you put the title completely in your child's name you have no liability, even if they are living in your house.