Hello Aspirant,

See marks does not depend on your reservation category or Home state, instead cut-off marks depends upon it. As you have asked for 4,00 rank so you should try to score at least 99.5 percentile according to January Session of JEE-Main 2020. Marks are little bit difficult to predict because now the pattern for result declaration has been changed and now only percentile and rank is declare.

But, however to give you an general idea you have to score more than 250 marks out of 300 but note that this can be changed as per the statistics of that time (September). You can get more details about Percentile Vs Marks from the link given below :-

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

You can also use JEE-Main College Predictor to predict your college according to the percentile and category, link for the same is given below :-

I hope this information cleared your doubts.

Good Luck!!