Hello dear student,
Greetings!
Since , you have completed  your graduation, you must have completed your 12 th at least 3 years ago from now.
So ,No you are not eligible for jee as Candidates should have passed class 12 or qualifying exam in 2018 or 2019 or Candidates should be appearing in class 12 or equivalent qualifying exam in 2020  to be eligible apply forJEE Main 2020.
For more information go through :-
https://engineering.careers360.com/articles/jee-main-eligibility-criteria
thankyou