https://www.irs.gov/individuals/international-taxpayers/exempt-individual-who-is-a-student
A student is any individual who is temporarily in the United States on an “F, ” “J, ” “M, ” or “Q ” visa for the primary purpose of studying at an academic institution or vocational school, and who substantially complies with the requirements of that visa.
485 이후 ead받아서 일 시작한 시점부터 substantial test로 카운트 하시면 됩니다.
485 접수 후 ead도 안 받고 일 시작했으면. 굿럭