TurboTax requires you to have a US address to register and efile your tax return.  

I can provide an US address where I used to live or my friends address. Where I suppose to change that one as currently I am staying in Toronto, Canada.

You can navigate to the dark border area to My Info and back to the Enter your current mailing address screen.

Update your address and then navigate back to the dark border area to Review and work forward from there.