The hotel is about 500 meters east to Tian'anmen Square on Chang'an Avenue.
Your tour will finish at north gate of The Forbidden City.
Your tour guide will meet you either at your hotel lobby with a sign that has your name on it. Your hotel are supposed to be located within the 4th ring road.
OR your tour guide meet you at the specified location( lobby of Beijing Hotel NUO ) near Tian'anmen Square. Go there, you can choose to use public transportation or take a taxi at your own expense.