There are different procedures to change.
1st - You need to make an affidavit stating the name.
2nd - You'll have to request the office of Birth & Death to Re-issue a Birth Certificate (This might require you submitting the old certificate).
3rd - You'll have to take out a notification in any Reputed Newspaper stating the change in name.
4th - You'll have to apply to SSC/10th board to reissue a new certificate indicating the new Name. (Supported by Gazzete Notification & Affidavit & Birth Certificate & News Paper Clipping)
5th - You'll have to apply to Inter/12th board to reissue a new certificate indicating the new Name.(Supported by 10th/SSC Certificate & Gazzete Notification & Affidavit & Birth Certificate & News Paper Clipping)
6th - You'll have to apply to University to reissue a new certificate indicating the new Name.(Supported by 10th/SSC Certificate & Inter/12th Certificate & Gazzete Notification & Affidavit & Birth Certificate & News Paper Clipping)
It's a long process..
Otherwise you could continue using the old name in the certificates and support with Gazzete Notification & Affidavit & Birth Certificate & News Paper Clipping each time you need it.