hi,

see iits has no state wise reservation, however nits has nearly 50% seats reserve for domicile candidates, so if you want to get the particular state quota, your category certificates should be signed by the respective state authority, nevertheless since you have sc category certificate of one particular state you are eligible to appear in josaa counselling if your credentials are all correct, now it does not matter your location of entrance test at counselling process.

follow our article at below link to know about 2021 jee main counselling process:

https://engineering.careers360.com/articles/jee-main-counselling

since you have participate in jee  main exam, it would be helpful for you to know about probable college name based on your category, score,  please use Careers360 college predictor tool,

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer