What Tax Form Should I File For Year 2021

Hi,

I came to USA on an F1 visa for the first time in end May 2016 for a summer internship. I was in a US University from June till end July (two months summer internship) and returned back to my home country to complete my ongoing undergraduate degree.

 

I again came to USA on an F1 visa in August 2018 to pursue my Master's. I was a student from August 2018 till August 2020 at the said US University. Subsequently applied for a USCIS EAD after graduation from the University. 

 

After receiving the approved EAD,  started work in a firm on F1 OPT from Jan 2021. Got my H1B visa approved and continued to work from 01st Oct 2021 till end of the year.

 

I filed my 1040NR, Schedule OI and Form 8843 for Year 2018, 2019 and 2020 with IRS regularly after the University made us aware of the need to file the same.

 

- Incidentally, I did not file Form 8843 for 2016 as I was not made aware of the need to file the same earlier and also had such a short stay in US that year.

 

- I plan to file my taxes now for Year 2021 and not sure as to what Tax Forms to use this year to meet IRS tax needs and regulations.

 

Looking forward to your advice on both the above two points.

 

Thanks in advance!