Disability Tax Credit – Are You Eligible? How do you know if you are eligible for the disability tax credit (DTC)? CRA’s website has a tool available where you can review some questions in order to figure out whether you are eligible to apply for the Disability Tax Credit Certificate. If you want to go through the questionnaire yourself, click on this link. We have also prepared a Disability Tax Credit Eligibility Decision Tree to help you determine whether you are eligible for the disability tax credit or not. Check it out!