Hello Anuj,
There are various parameters like nationality, age, educational qualifications which needs to be kept in mind by the candidates you want to apply for the exam. As per the Supreme Court order, candidates of 25 years or older could also apply for JEE Advanced 2019 provisionally until further notice. The main criteria to appear in the exam are candidates must qualify JEE Main 2019 and secure a position among the top 2,24,000 candidates (including all categories). For more information, you can check out the link below. Good Luck!
https://engineering.careers360.com/articles/jee-advanced-eligibility-criteria
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