You enter you legal residence state. When asked if you live in another state, answer no (you were only a temporary resident, which makes you a non resident for tax purposes).
When asked if you earned money in another state, answer yes if you made money while a temporary resident.
That answer is based on certain assumptions. Primarily that your stay in the non resident state has a temporary purpose and your intent is to return to your home state, in the near future. Otherwise, you are a part year resident of both states.
