Hi, I arrived in the US as an au pair (J1 visa) in April 8th 2018, I left the country for 3,5 months in 2020 (May 4th to August 20th) and then came back with an F1 visa. I am currently on a F1 visa. How do I calculate my substantial presence test? Knowing that I have taxes to pay for last year and my 4 months as an au pair.
