Well, now that I'm been reading to file the taxes myself, I'm not really sure. Here is my case: I arrive to the US on January 2015 under an F1 status. I never worked or had scholarships or any other income, so I didn't have to file taxes. I never new I had to fill an 8843 form, I just learned about that now. On October 2016 I travel back to my country and reentered the US under a J1 status and I've been working with my current employer ever since. I'm reporting the taxes for that income with the W2 given by my employer. Since I didn't claim being an exempt individual with the 8843 I'm not sure if I qualify as nonresident alien for tax purposes.
