I moved to a new state mid-way through last year, but kept working remotely in the first state. I filed my taxes through Turbo Tax, and based on that should have gotten a portion of my state return back from the first state and pay some to the new state. I paid the new state, but the first state sent me a revision letter and didn't give anything back. I definitely believe I overpaid, but haven't been able to get someone from the state #1 tax office on the phone to fix things. How do I fix this, and how do I make sure it doesn't happen again this year?