Families often describe the years around 18 to 21 as falling off a cliff. For years the school was the centre of gravity: the plan d'intervention, the educators, the routine, the team that knew your child. Then the school years end, and the structure that held the week together is suddenly gone. The adult system exists, but it is organized differently, it does not come looking for you, and it asks you to step into a coordinating role you may not have expected. This guide explains what changes, what the adult system offers, and how to prepare so the transition feels less like a cliff and more like a planned step.
A note first. Programs, names, and eligibility rules change, and they vary from one region and one CISSS or CIUSSS to another. Treat this as a map of how the pieces fit together, and confirm the specifics for your area.
Why the transition feels so abrupt
In the youth years, services are built around school. The education system carries a legal duty to your child and organizes much of the support around the plan d'intervention. The adult world has no single equivalent hub. Health and social services, daytime activity, employment support, income, and housing are run by different programs that do not automatically talk to each other. Nobody hands you a single file. The shift, in practice, is from being a participant in a system that organized itself around your child to being the person who connects the pieces yourself.
Start with the TEVA plan, ideally years ahead
Quebec has a planning process designed for exactly this moment, known as the démarche TEVA, the transition from school to active life. At its best, TEVA begins well before the school years end, often around age 15 or 16, and brings the school, the family, the young person, and the relevant services together to plan what comes next: work, daytime activity, continued learning, and the supports each will need. If your child is in secondary school and you have not heard the word TEVA, ask the school about it. A transition planned over two or three years is a very different experience from one improvised in the final months.
The pieces of the adult system
Adult DI-TSA services through your CISSS or CIUSSS
Specialized services for adults with an intellectual disability or autism are delivered through your regional CISSS or CIUSSS, in the program area usually referred to as DI-TSA-DP. This is the adult counterpart to the youth specialized services your family may already know. If your young adult has been receiving services as a minor, ask the current team directly how the file transfers to the adult program, because the transfer is not always automatic.
Daytime activity and socio-professional integration
For many young adults, the biggest question after school is simply what fills the day. Depending on the person, options can include day centres and community day programs, socio-professional integration activities, supported or sheltered work settings, and employment support services that help a person find and keep a job. Availability and wait times vary, which is one more reason to plan early.
Income and financial support
The financial picture changes at adulthood too. The supplement families received for a handicapped child does not carry into adult programs unchanged, and adults with a severe and lasting limitation may instead qualify for provincial income support designed for that situation. Beyond income, look at the registered disability savings plan, the disability tax credit, and the other benefits that apply once a young person is an adult. I keep a fuller list in the guide to subsidies for autism and intellectual disability in Quebec.
Housing and living arrangements
Some young adults will continue to live at home, some will move toward supervised or supported living, and some will be on a wait list for a residential resource for years. Whatever the direction, it is worth raising early with the adult DI-TSA team, because the planning horizon is long.
The legal change runs alongside the service change.
At 18, your authority as a parent ends at the same time the service system shifts. If your young adult cannot make some or all of their own decisions, you may also need a protective measure such as the assistance measure or tutorship. The two transitions are separate, but they land in the same year, so it helps to think about them together. See turning 18 with autism or an intellectual disability for the legal side.
Where a social worker can help
This is a coordination problem as much as anything, and that is squarely social work territory. A social worker can help you map which services apply to your young adult, understand how the adult DI-TSA program works in your region, think through the legal measures that may be needed, and keep the medical, financial, and legal threads moving in parallel rather than one stalled behind another. For English-speaking families in particular, having someone who can navigate the system in your language removes a real source of friction.
What to do this year
- Ask about TEVA now. If your child is still in secondary school, ask the school whether a transition plan is in place and push to start it early.
- Confirm how the file transfers. Ask the current team how your young adult's services move from the youth program to the adult DI-TSA program, and what you need to do.
- Map the day. Picture what an ordinary weekday will look like after school ends, and work backward to the services that make it possible.
- Line up the legal piece. If a protective measure is likely, begin the medical and psychosocial steps in parallel so it is ready when you need it.
If the adult system feels like a maze, you are not imagining it. I offer free 15-minute consultations, and a common starting point is simply sorting out which doors are yours to knock on and in what order. You leave with a clearer next step than you came in with.