@Shan0727 , having gone through your post and generally agreeing with my colleague @Opus 17 ( for his excellent reply ), my understanding of your situation is as follows :
(a) You came to the USA as a student on F-1 on 2019. Thus assuming that this was your first entry in to the USA, your five year "exemption " ( from counting days present ion the USA) would have completed on 12/31 /2023.
(b) You left USA and probably therefore cancelled your F-1 status ( not continuing to be a student and physically present in the USA ) sometime in 2022 ( what date please ). You left while still an NRA.
(c) For tax year 2023 (you not being present in the USA,) you continue to be NRA. Also , even though you have a bank account in the USA ( true ? ) wherein you receive payment from Indiana University at Bloomington, your connection to the USA is limited ( and probably more connected to your home country -- which, please ) and therefore you are NRA.
(d) Being NRA, and performing work remotely in your home country, you generally would be immune from US taxation ( Federal, State and locality , as suggested by @Opus 17 ).
Please answer my questions above and I will circle back once I hear from you --yes ?
Is there more I can do for you ?
