hey there!

You can apply in JEE main for the three consecutive years after class 12th that means, you have total six attempts. So, be rest assured you can apply in jee mains 2021, as you have passed your class 12th in 2019. To get help in your preparations and perform well, you could use the careers360.com jee main knockout course. Here's the link for that - https://learn.careers360.com/engineering/jee-main/

Hello aspirant

As you have cleared your xii board in 2019  you can appear for jee main 2021. But you will have to present your gap Certificate with reason why you couldn't appear before. Eligibility to appear for jee main is to have passed xii Science with minimum 50% score in PCM subjects.