Hi everyone, I got my first salary from my company this week, but now the office staff is asking me for some extra papers and I’m honestly confused 😅

Hi everyone, I got my first salary from my company this week, but now the office staff is asking me for some extra papers and I’m honestly confused 😅 They mentioned something about a copy of my bankbook, insurance, and maybe a tax form, but they asked so fast in Korean that I couldn’t catch the real question. I’m on a work visa, so I’m worried about giving the wrong document or missing something important. Has anyone dealt with this after the first paycheck, and how did you ask the company to explain it clearly?