I was an international student on F1 visa (visa is still valid) and worked on-campus (as part time) while in college and then after college worked full time for about an year. When I was in college I filed my tax returns (in 2014 and 2015) but din't file while I was working full time i.e. 2016 and 2017.
I left my full time job and came back to my home country permanently in 2016.
1.) Should I file tax returns in case I get any money back?
2.) What if I owe the IRS money and don't file?
