Need help with CSS profile (international student)

I am from Romania and my parents haven’t heard about “federal income tax return(s)” or “W-2 forms and other records of money earned”, and so on. I don’t know if we have such things in Romania, and even if we would, I don’t know how to get them. If there is any international student who went through the same situation, could you please help me out a little? Thanks in advance :).