The JEE main 2021 exam is being conducted in 4 sessions. Before each session the correction window is opened for students where they can change their application information like category. Currently no information about the correction window has been provided in the official JEE main 2021 website about the exact date when it will be opened.

Check the official website regularly for Correction window. When the correction window is open, log into your application using your application number and password. At the end of the page, an Edit application form link will be available which can be used to change category to EWS and to upload EWS certificate if it is asked.

You can also visit Career360 official website for all regular updates regarding JEE mains and other exams.

Best of luck!!