How do I delete Medical Expenses from my return file? All options are greyed out and don't allow this. I want to compare my return with and without my medical expenses.

Unfortunately, once you have NETFILED your income tax return, you cannot make changes to it.  You would have to make an adjustment request.  If you want to compare a return without medical expenses, you will need to start a new return from the beginning.

https://turbotax.community.intuit.ca/replies/2647992