How to claim the US-China tax treaty?

I am an international student pursuing a PhD degree. My tax status changed from non-resident alien to resident alien in 2016. The US-China tax treaty Article 20 states students have some credits for tax. How could I claim it? I didn't receive the 1042-S form. I know that I have to include the form 8833 on my tax return generated by TurboTax. But how should I do that?