American individual tourist visa DS- 160. What's the address in America? I'm going to new york and Washington, but I haven't decided where to live. What should I write?

Your application for a personal tourist visa requires a copy of your travel plan. Your hotel reservation in America is part of your plan. Therefore, the address you are required to fill in the ds form is the hotel address where you booked the hotel. You must have it. Don't say you're not sure. I won't convince the visa officer.