Can I claim parking expenses when I was parking at the hospital for doctors appointments? Also how do I go about claiming millage and meals for out of town appointments?

You can only claim parking fees as a medical expense if you were required to travel to obtain medical treatment.

Here's a good resource from the CRA on eligible travel expenses for medical treatment: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-re... 

Here's how to enter eligible travel expenses for medical treatment in TurboTax: https://turbotax.community.intuit.ca/replies/2648074