I came in august 2015. I was on f1 till sept. 30 2019. I do not pass the substantial Presence test for year 2019 as I was on h1b for 90 days and rest of the days I was on F1. Thats why my company hold FICA taxes only from Oct 1 2019. But since I am filing taxes as non resident Alien , I think i might get the FICA taxes back. Not sure about it though
