I got accommodations by having my psychiatric nurse practitioner fill out a form the college provided to document that I had ADHD and what sorts of accommodations would help me. She had to choose from a list that included things like a quiet room for the test, additional time to take tests, etc. It was an efficient process and just required one form from her and I think she sent in some of my test results too. She charges only about $150 per hour so for me it wasn't as expensive as some have said. I did see her regularly for meds, though, so we had an ongoing relationship. If it is your therapist who has diagnosed you and given you the tests, then probably she could do the paperwork for your school. When my therapist suspected I might have ADHD, he wouldn't diagnose it, though, but sent me to the psychiatric nurse practitioner. I think some therapists don't have the training to make an ADHD diagnosis, so you can probably just ask yours if she is qualified to do the paperwork for you. If not, she can probably refer you to someone who can help. What about the person who prescribes your medication? Could he/she do the "official" paperwork for you?