Got a denial letter for unemployment, what now? (update)

I got a denial letter last week saying I left my job voluntarily, but I was let go as a retail manager. I am in Seattle, in case local advice matters. I have not done a hearing before and I am nervous. Did you bring documents or only talk?

Stay calm and stick to facts. Mine lasted about thirty minutes and felt more like a conversation than a trial.

Legal aid offices and some workforce centres help with unemployment hearings at no cost. A call is worth it.