Cynthia, here is my suggestion: I would start with The Arc (the arc.org) especially their Center for Future Planning, and the National Resource Center for Supported Decision-Making. They have great resources to help families understand what changes at 18 and the different options available, including supported decision-making, healthcare releases, power of attorney, and guardianship when necessary. You can also look up your state’s Disability Rights organization. They may be able to provide guidance or connect you with free or lower-cost resources in your area. I’d would think through what areas he is likely to need help with as an adult—healthcare, medications, appointments, finances, education, benefits, transportation, etc. Then, a final suggestion would be meeting with a special-needs or disability attorney in your state. They would be able to ensure every is legal and ensure i’s are dotted and t’s crossed.