Hi

With 66039 AIR/ crl, your obc rank would be roughly around 18k - 19k obc rank

This is difficult to make prediction as  cutoff  depends upon various factors like :-

-----------) number of students/ candidates  that appeared in the  jee main exam,

-----------) number of available seats,

-----------) performance of different students in the examination,

-----------) the branch you want,

-----------) the category you belong etc.

But yes,

When we go through previous year trend then

With your 18k - 19k obc rank rank,

You have chances in GFTIs,  as per round 6th , 2020 in josaa counselling , some if which are listed  below:-

-----------) National Institute of Foundry & Forge Technology, Hatia, Ranchi:- Metallurgy and Materials Engineering (4 Years, Bachelor of Technology):-  20554 obc rank

-----------) Sant Longowal Institute of Engineering and Technology:- Food Technology:- 21480 obc rank

-----------) Institute of Technology, Guru Ghasidas Vishwavidyalaya (A Central University), Bilaspur, (C.G.) :- Industrial and Production Engineering:- 21390 obc rank

-----------) National Institute of Food Technology Entrepreneurship and Management, Sonepat, Haryana :- Food Technology and Management:-21889 obc rank

And a few more

You can check the closing ranks  at official website of josaa by going through the link given below

https://josaa.nic.in/Result/Result/currentorcr.aspx

In order to get a personalised report on your chances of getting a college you can go through our college predictor, it will give you complete list of colleges which you can get on the basis of the category you belong to,  your home state, your gender etc, the link for  jee main college predictor is provided below

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

To help you  further,

Minimum percentile in jee main 2021 to qualify it to  be eligible for jee advanced 2021 is given below :-

--------) general :-87.8992241 percentile

--------) EWS:- 66.2214845 percentile

--------) OBC-NCL :- 68.0234447 percentile

--------) SC :- 46.8825338 percentile

--------) ST:- 34.6728999 percentile

--------) PWD :- 0.0096375 percentile

Thank you