No, I'm afraid that you cannot edit and make changes if you have filled the form online. 

After payment of the online registration fee, corrections, additions, deletions etc. in any manner shall not be allowed in the registration form. The candidates are, therefore, advised to fill their forms carefully. The incorrect form will be summarily rejected. However, an applicant can start afresh by online registering again using the new registration id and password and applicant will need to submit an online registration fee again.

You can also contact them once and tell them your issue and request for a manual change to be made if possible

good luck!