I'm sorry, but TurboTax cannot do anything for you. TurboTax does not support Form 1040-NR and does not support tax filing for nonresident aliens. TurboTax does not have any software or other product or service that you can use. You will have to look elsewhere for help with your U.S. taxes.
I suggest that you seek help from a local tax professional. I'm sure there are many tax professionals in Canada who have experience filing U.S. tax returns for residents of Canada and can guide you.
