Hello Ashish,
The authorities first release the Qualifying cutoff category wise. Qualified candidates are eligible for admission to engineering colleges (NITs/IIITs/GFTIs) then there is separate cutoff for admission to every college.
JEE Main cutoff vary according to the category, state, branch.
You can go through the link below to check the JEE Main qualifying cutoff and previous year cutoff for NITs, IIITs and GFTIs.

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

Good Luck!

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