Overseas non-resident tax

Hi, I am from Korea and currently studying in the US. I have earned money while working at a university and filed a tax from 2019 to 2020. In September, I am going back to Korea, but I will keep my bank account open. I wonder if I can file a tax outside of the US. I would like to report the income that I earned in 2021 and I will be getting stock dividends this year. I wonder if turbotax e-file is available for alien non-resident taxpayers who do not have a US mobile phone/address; I see that I have to do the extra security verification (e.g., getting a text message for a security code) while logging in. I am looking for a way to file a tax online in Korea.

Thank you.