Thank you. Does the treaty exemption then only apply to those who are here in a capacity of researcher/teacher on a J-1 visa for a limited amount of time (below...

I did my PhD in the US on an F1 visa (2011 to 2017), prior to that I was in the US on an F1 (2005 to 2009) and then a H1B (2009 - 2011). I entered the US on my ...