Got a denial letter for unemployment, what now?, administrative assistant here

I got a denial letter last week saying I left my job voluntarily, but I was let go as an administrative assistant. 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 made the follow-up calls so much easier.

File the appeal before the deadline, even if you are unsure. You can gather documents afterwards. That is the one part I would not wait on.