You may be able to claim the Canada caregiver credit if you support your spouse or common-law partner with a physical or mental impairment. A person is considered to depend on you for support if they rely on you to regularly and consistently provide them with some or all of the basic necessities of life, such as food, shelter and clothing.
The CRA may ask for a signed statement from a medical practitioner showing when the impairment began and what its duration is expected to be. You don't need a signed statement from a medical practitioner if the CRA already has an approved Form T2201, Disability Tax Credit Certificate.
This CRA page has more info: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-return/completing-a-tax-return/deductions-credits-expenses/canada-caregiver-amount.html