Should I file for taxes if I have been in my degree program remotely from abroad (not in F1 yet) and have been receiving fellowships from my school via a US bank account?

I have not entered the US for 2 years. I am getting a stipend and insurance aside from the tuition reimbursement for my school. Normally my program is a residential program but some international students have been joining remotely due to the pandemics. Should I get an ITIN asap? If I should file, then what forms should I file?