Sorry for the delay…I had not checked in here for a while. To answer some of the questions:
@quest32 - I bought my car from a private individual, so there was no sales tax paid in Canada. That may be different if the purchase were through a Canadian dealer. I paid sales tax in Texas when I registered the car and applied for a Texas title.
@bwdenman - The bill of sale was basically just a document the seller and I signed, summarizing the terms of the sale; it was not an official document. You need to transfer ownership while still in Canada, so you can present the documents when you cross the border.
You need the current registration of the seller, particularly because most Canadian provinces do not issue titles…the registration serves as proof of ownership
Yes, the former owner’s registration. At the bank, the seller signed the bill of sale and registration (Ontario does not issue titles for vehicles, the registration serves as proof of ownership.
No, I did not pay any sales tax in Ontario. I paid sales tax in Texas when registering the car.