Hello,
I was on an F1 Visa during the period Sept 2011-Jun 2015 but did not take advantage of my opt. In 2018 I got another F1 Visa for my master's degree and am currently in the middle of my OPT work in NY. Do I need to file form 1040 or 1040-NR? Also, can I still claim the FICA taxes back, or does the 5-year limit include my old F1.
Thanks
