ちなみにCan I Claim My Spouse's Medial Expenseとグーグル先生に聞いたら以下のように出ました。
合計をどちらかのリターンでクレームすればいいよ、ということですよね。
You should claim the total medical expenses for both you and your spouse or common-law partner on one tax return. You can claim the medical expenses on either spouse's tax return. If both spouses have taxable income, it is usually better to claim the medical expenses on the return with the lower net income.Feb 12, 2015
Claim your medical expenses on the tax return of the spouse with ...
www.taxtips.ca/personaltax/medicalclaims.htm
The Canada Revenue Agency requires each taxpayer to file his own return, meaning even if you are married, you must submit your own individual tax return.