I was in USA on a J1 research scholar since 2018. I left my job (and my ds2019 expired) and returned to the UK in Sep 2021. I have been asked to complete either a W9 or a W8BEN for IRA reasons. Which one do I file? Do I still count as a resident alien (for tax puposes)? Or am I dual status now? If I am dual status, which form do I complete? Thanks in advance!
