Hi

First of all correction can be made using correction window including your uploaded photographs so one can change OBC NCL certificate but worry if you don't have Central OBC certificate.

This is because,
OBC state certificate is acceptable provided you are in the central list of OBC . You can check whether your cast is in the central list or not at official website of ncbc
http://www.ncbc.nic.in/User_Panel/CentralListStateView.aspx

After checking the central list in case, if you are not in the central list then you must choose general as your category as per the Information Bulletin released by NTA and that can be done using correction window

Correction Window for jee main February session has opened on 27th January  2021 and correction can be made using correction window till 30th january 2021 .

To use correction window, you need to visit the official page of JEE Mains i. e jeemain  . nta  . nic  . in  and login using your registration number and password and then you will be able to rectify your mistakes

But yes , while using the correction window you should make sure that all your details are correct because once you use the correction window , you won't get another chance to use the correction window again as it is a single time facility. So, do check all the details twice.

For detailed information you can visit our page the link for the same is provided below

https://engineering.careers360.com/articles/jee-main-application-form-correction

Now that,
limited time is left for jee mains 2021 , so you should be focusing on your preparation, go through chapters first , major focus should be on grasping concepts , practising questions and then revising them, go through previous year question , and mock test papers as it will let you know your preparation level and and weak areas so that you can work on them and perform well in your examination.

Thank you