Appeal deadline questions after an unemployment denial (Memphis)

I got a denial letter last week saying I left my job voluntarily, but I was let go as a store manager. Thank you in advance. My employer's version of events does not match mine, and I have emails that show it. If you have appealed before, what helped you prepare?

Keep everything in writing and save the confirmation numbers. It saved me later.

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