Add Comment Question: How deaf do you have to be to get disability tax credits i wear hearing aids all the time??? Answer: With regard to the disability tax credit, you should review their website page on hearing loss: https://www.canada.ca/en/revenue-agency/services/tax/individuals/segments/tax-credits-deductions-persons-disabilities/disability-tax-credit/eligible-dtc/hearing.html. Your Comment * Your Email * Your Name * Your City Note, your name, city and email is not displayed on the website. It is used to notify you that we have approved your comment.