SNAP after a layoff: what documents did you send? - any advice?

I got a notice asking for proof of income and I am unsure what to send. There are 3 people in my household. Did they ask for anything unexpected?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

Take photos of everything you send and write down the date. I had to resend one page and the record helped.