Dear student,

State of eligibility means that, from which state you have passed your class 12th board exams.

On josaa offical site in the section of INSTRUCTIONS TO CANDIDATES , it is clearly mentioned you have to submit - class 12th marksheet / state of eligibility proof . That means you can submit class 12th marksheet as your state of eligibility proof .

Also check out the following offical link to know which document to upload :-
https://josaa.nic.in/webinfo/File/GetFile?FileId=23&LangId=P

Also check out the following link to know More about josaa 2020 counselling :-
https://engineering.careers360.com/articles/josaa-counselling