It would be difficult to provide you the exact qualifying score or admission cutoff 2019 as JEE Main is being counducted twice by NTA for the first time and rank will be based on NTA percentile score which will be decleared in the month of April after the both of the session ( Jan & April).

As a total No. of 1,45,386 candidates had appeared for January Session, Using the Formula (100-your score)* 1,45,386 / 100- Your Expected rank will be 7,269. With this rank the chances seems less to get a seat in top NITs.

NOTE: This is only the predicton, The actual rank will be announced in the month of April

You can also prefer the below given link to take an Idea about the previous year cutoff

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning

Good Luck!