I transitioned from the non-resident alien to the resident alien status in 2017 (6th year on my F-1 visa). However, FICA (Social Security and Medicare) taxes were not withheld by my previous employer that I worked for during the first 6-7 month of 2017. I notified the employer about the problem and they told me that they would fix it within a month starting from now. HR had no clue whether W-2c will be issued or not (she just asked an external payroll company to fix the problem). Do you know what I should do in this case? Wait for the new W-2c and file an extension if it doesn't come in before April 15th, or file the taxes as is (with the old W-2) and amend the return, if W-2c comes in?
