I have a Valid B1/B2 visa on my back home passport and I traveled on that visa in 2011 for vacation in US while living in Canada.

Got Canadian citizenship and passport, after that I travel us on my Canadian passport.

In September 2011, I got TN visa for work in US.

Does it consider change of visa type?

What should I enter on 1040nr Schedule OI question F. Yes or No.
B1/B2 to TN

Or just enter No.

Thanks.

Enter YES, then enter TN

Thanks for your answer.

Glad to help!