My exam was on 27Sept shift1. My preparation was mains specific. So what I can do in this 1 month for jee advanced? From where I should start? I have attempted jee advanced 2020 paper and got 60 marks overall (both papers). Please list some important chapters from physics, chemistry and maths also.

Hello aspirant
Hope you are doing well
Be confident and strong So u need to prepare a revision timetable which will allow u to study all the 3 subjects in a planned manner.First study your strong topics so that you maximize your score from those. Solve problems from the selected books as well as your coaching class book which u may not have solved earlier. You can get the sample papers for jee advanced from the link given below
https://engineering.careers360.com/download/jee-advanced-sample-papers-previous-years

First you can study your strong topics so that you can maximize your score from those chapters solve problems from the books which you have not solved earlier . Spend more time on maths since it requires more of problems solving than any theory.
Below is the link for the important topics tricks and books for jee advanced
https://engineering.careers360.com/articles/jee-advanced-2021
Good luck
Hope it helps