How many marks (minimum) I need to get a confirm seat in any iit for csc. I am oc(caste) from tn

The admission in IIT is based on. JEE advanced marks and the total marks for JEE advanced is not fixed it keep on changing every year but whatever be the marks if you score 31.5 % out of total marks then you will definitely qualify the JEE advanced but the actual admission will be based on the rank which you get in the JEE advance so  may be different for different marks and there is no prediction regarding marks vs ranks because you at now we even don't know what is the maximum marks for JEE advanced 2019 therefore you need to wait till the exam get over.

hello aspirant,
NTA still yet didnt release the cutoff for jee main 2019  regarding categories for getting in to admission in to NIT'S and IIT'S that too on our drsired branch
kindly wait, untill the NTA announces the cutoff marks and category list wise courses
since,  we cannot predict exactly, due to every year there are several changes in the admission process.
it depends on the how many students are attempting exam, complexity of paper etc...
thank you