https://www.vox.com/2019/1/23/18194898/trump-state-of-union-constitution-pelosi

"Trump can’t just demand his way into Congress to deliver the State of the Union, because the House and Senate have to pass a concurrent resolution for there to be a joint session of Congress where the event would take place. 

"Neither chamber has taken a vote on that yet, and in a response to Trump on Wednesday, Pelosi said she doesn’t plan on it. She reiterated her point: Trump can come at another “mutually agreeable date” when the government has been opened."