Hello Aspirant,

Don't worry you are eligible for JEE-Advance 2021 because your eligibility is decided on the basis of your JEE-Main percentile not rank.

As the cut-offs are released along with the JEE-Main 2021 result so now it is clear that at what percentile the candidate is eligible for JEE-Advance 2021. As per the NTA, qualifying cut-offs goes like :-

==>> Common Rank List (CRL) - 87.8992241-100.0000000 Percentile

==>> GEN-EWS - 66.2214845-87.8950071 Percentile

==>> Other Backward Classes (OBC-NCL) - 68.0234447-87.8950071 Percentile

==>> Scheduled Caste (SC) - 46.8825338-87.8950071 Percentile

==>> Scheduled Tribe (ST) - 34.6728999 87.8474721 Percentile

==>> PwD - 0.0096375-87.8273359 Percentile

So with 80 percentile you are qualified for JEE-Advance 2021 and you can apply for JEE-Advance 2021 using the official site given below :-

https://jeeadv.nic.in/jeeadvapp/root/loginpage.aspx

You can check out more details about JEE-Main 2021 qualifying cut-offs from the link given below :-

https://engineering.careers360.com/articles/jee-main-cutoff

To have a list of all those colleges which you can get based upon your marks, category, and state you can use JEE-Main College Predictor:-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

I hope this information helps you.

Good Luck!!