Hi aspirant

Definately you can change while the editing window will be opened by the authority.

Don't be worried about it.But keep a check through th official website when the editing window is going to open.

You must kee in mind few things before filling the forms:

1.Read all the notices related to the exam

2.Read all the instructions carefully .

3.Collect signature and Photographs and other document in proper format and keep them in separate folder.

4.Before filling the form sit in a quiet place and keep all your documents by your side so that you can fill the form by once confirming with the original documents.

Hope this helps you.