Shouldn't the screen Payments Related to your Principal Residence include in Ontario and student residence along with on a reserve, and/or a public long-term care home?

The student residence part is mentioned on the next page. You only get a $25 credit for living in a student residence, it’s not based on the actual amount you spent. The actual ON-BEN tax form doesn’t ask for a student residence address – it has wording similar to what is shown in the TurboTax EasyStep page that you are looking it. That’s probably why it doesn’t say “Ontario” – the sentence on the ON-BEN form doesn’t mention Ontario either, though it is on other parts of the form.