JEE

At rank 40000, you will get some good colleges but you will have to compromise with the branches as you will get lower branches, but if you don't want to compromise and want to get upper branches or core branches then you will have to go for some lower colleges
The admission cutoffs are usually released by JoSAA on behalf of the colleges that are participating in the counseling process. According to the JoSAA given below are opening and closing ranks of some NITs ( open category only)
NIT Agartala
4,080- Opening rank
25,737- Closing rank
NIT Calicut
470- Opening rank
17,731- Closing rank
NIT Delhi
707- Opening rank
13,423- Closing rank
NIT Durgapur
7,376- Opening rank
21,206- Closing rank
NIT Goa
2,574- Opening rank
18,383 - Closing rank

Well, the best colleges through JEE Mains are:
NIT Trichy: average CSE package (17 to 20) LPA.
IIIT Hyderabad: average CSE package 26 LPA
NIT Rourkela: average CSE package (15 to 18) LPA
NIT Suratkal: average CSE package 17 LPA
NIT Warangal: average CSE package 18.55 LPA
NIT Calicut: average CSE package 15 LPA
NSUT, Delhi: average CSE package 17 LPA
DTU: average CSE package 15 LPA
MNNIT Allahabad: average CSE package 15 LPA
IIIT Delhi: average CSE package 18 LPA
IIIT Allahabad: average CSE package 16 LPA
BIT Mesra: average CSE package 14 LPA
IIIT Bangalore: average CSE package (17 to 20)LPA. This college offers Dual degree programme M.Tech not B.Tech. NIT Kurukshetra: average package 7 LPA
IITH, IIITD, IIITB are private institution & rests are Government institutions.

Congratulations on your results. The JEE Main Cutoff for 2022 was recently released, and usually this cutoff is of two types: the qualifying cutoff and the admission cutoff. The joint seat allocation authority JoSAA will release the admission cutoff for JEE Main which is the opening and closing ranks for B.Tech admission in each government institute such as NIT. According to the information you have given, you may be able to get into select institutes such as NIT Warangal, Netaji Subhas University of Technology (West Campus), and Indian Institute of Information Technology, Lucknow. However, it will also depend on the branch and your home state. You can also get admission into government colleges in your state that accept JEE scores. Alternatively, you can use the Shiksha platform's JEE Main College Predictor 2022 (https://www.shiksha.com/engineering/jee-main-college-predictor) to get more specific recommendations based on courses, fees, and rank. Here you need to enter your JEE rank or percentile, gender, category, and domicile to get recommendations of possible good colleges.

If you JEE Mains rank is 47000 in OBC then you get cannot the best IIT even if your CRL rank is 65000, you can't also get into NIT. I am not demotivating you but I have 2 to 3 suggestions for you,
1. Take drop and aim for IIT Bombay and it is achievable if you don't repeat your mistakes. (I will prefer join any online coaching)
2. Go for state level CET exams and go for state level best college.
3. Some private colleges such as Lovely Professional University and etc. accepts low score of JEE Mains also, it is a good option. Go for JAC counselling, state counselling accepting JEE Mains score. I am from Maharashtra, but I know that this year UPSC was cancelled and getting colleges on the basis of JEE Mains.
4. If you have enough time and preparation, go for JEE Advanced and go for lower IIT, if you are able to get lower rank.

First of all, congratulations on your results. The National Testing Agency NTA conducts the JEE exam for admission to premium IIITs and NITs. Recently, it has released the JEE Main Cutoff for 2022, and usually this cutoff is of two types: the qualifying cutoff and the admission cutoff. The admission cutoff for JEE Main will be the opening and closing ranks for each institute and will be released by JoSAA (joint seat allocation authority). Based on the information you have given, you have a chance to get admission into select NITs like the National Institute of Technology (NIT) in Rourkela, the National Institute of Technology (NIT) in Arunachal Pradesh, and the NIT in Mizoram. However, it would also depend on the course you wish to enroll in. Like at NIT Rourkela, the cut-off for B.Tech. In food process engineering was around 45,000 in 2021. You can also use the Shiksha platform's JEE Main College Predictor 2022 (https://www.shiksha.com/engineering/jee-main-college-predictor) to get more specific recommendations based on courses, fees, and rank. Here you need to enter your JEE rank or percentile, gender, category, and domicile to get recommendations of possible good colleges.