I’ve already filed tax but I didn’t include my rent fee and emergency medical care. Can I file those two after I filed my tax return?

After you file

Yes. You can make changes after you have filed your tax return through the Canada Revenue Agency (CRA) or through ReFILE. This FAQ has more information: https://turbotax.community.intuit.ca/community/tax-return-amendment/help/i-have-filed-my-tax-return-...