https://www.canada.ca/en/revenue-agency/services/tax/individuals/segments/tax-credits-deductions-persons-disabilities/disability-tax-credit/eligible-dtc/speaking.html https://www.ohrc.on.ca/en/policy-ableism-and-discrimination-based-disability/2-what-disability https://www.thenba.ca/disabilities/speech-disorder/. Hope this helps. I also reccomend you check out the stuttering with confidence program if you need help with controlling your stammer. Also the Hollins Institute has been known to help some people.