How can I find the canada bus arrival in port authority

There are offices at port authority to assist the public on where to go

You can ask a work or police

There is a helpdesk upon arrival to port authority$

There is good signage, PA system , and customer service desks/kiosks.

There are signs of directions to the bus stops. Just take your time to read through. You may also ask the workers, they are very frendly and courteous

Go to the information booth near the exits and ask attendee

I'm sure it is the Greyhound bus at the portauthrity terminal, Google it.

You can check greyhound bus. There is greyhound bus started from Toronto to port authority in NY

Ask workers

Look at the screens or ask a worker if you're not sure.