Appeal deadline questions after an unemployment denial - first time posting

I got a denial letter last week saying I left my job voluntarily, but I was let go as a bookkeeper. I do not usually post, so bear with me. The letter lists a deadline and a hearing process, but it is hard to follow. Did you bring documents or only talk?

I printed my emails in order and wrote a one-page timeline. The hearing officer kept going back to it.

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