In 2017, i filled form of jee main, but didn't attempted..i failed in board then i passed from NIOS in december previous year.
Dear Student,
In order to appear for JEE Main 2019 only students who have completed their 12th in 2018 and 2017 are eligible to apply.
To know in detail you can refer below link
https://engineering.careers360.com/articles/jee-main-eligibility-criteria
Good Luck!!

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