If you have a child or teen with moderate or severe ADD/ADHD, or ADHD with significant coexisting conditions (like Autism, Depression, Oppositional Defiant Disorder, Anxiety, Learning Disabilities) it is worth completing the form and applying. To do this, download the T2201 form from CRA and have your doctor complete it. In general, doctors will charge a small fee for completing the form, and you can talk to your doctor about the fee if you have a concern with it.