Yes, you will be able to correct it. The admit card was released yesterday and those who have corrections in the submitted application form will be sent a 'memo' . This means that you can correct it. 

• Login to KEAM 2019 candidate portal
• Click on 'memo details'
• If online correction is provided, try to correct it

According to an official KEAM notice ( go to www.cee.kerala.gov.in -> KEAM 2019 -> application and examination details -> press release), if there is any corrections to be made to details in profile page, like personal details, reservation details and other benefits, you need to send an application requesting changes either by post or in- person to CEE.

Since you have defect in the caste column, check KEAM prospectus to see if your caste is specified as NCL. That could be the problem, as application for reservation form candidate belonging to unreserved communities are rejected. Also check if you have uploaded the caste certificate in prescribed format. If your caste is OBC-NCL, then you will obtain relevant reservation. 

You will get OBC consideration during allotment, only if you submit correct certificates before the prescribed dates. 

Send the letter to CEE, requesting changes to personal details which are seen only on your profile page, before 5 PM on April 25

Such corrected applications along with supporting documents must be submitted online on or before May 5. 

If you have any furtherquestions, feel free to ask me!