Hello,
If you haven't selected EWS category in registration form then you cannot heap and take the benefits of EWS certificate during the time of councelling process.
Because, the exam and councelling round authority regulates and calculates the merit list is prepared by the category and rank given during the registration and application form.
Through EWS certificate, a candidate gets various benefits like low fees structure , good chances of getting some colleges that other open category candidates may not get, etc. But, you may contact the concerned authorities at the time of councelling process
Hope that helps. Good luck
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