I have a child with TS but also have a little knowledge about what you are asking as I work as a Social Worker.
My suggestion is that you contact your local office of Minnistry of Community and Social Services and get directed to the Ontario Disability Support Program.
You can pick up an application there, or maybe even on-line.
Your doctor needs to fill out most of the paperwork.
Not to discourage you, but it does take several months to process an application, so if this is the path you choose, you should get the form ASAP.
Best of luck to you,
Mother of 10 year old son with TS