Hello
Klmy,
I was wondering where you disappeared. Good to see you back
1) No need to include parents.
2) You need not fill the form at all. Cancelling is meant for applications that are in process. For example if you had continued with your earlier application and while in process you wanted to cancel the services of your representative, you would have had to fill this. But now that you are filing a brand new application, just ignore this form completely. It is then understood that you do not have a representative.
Trust this clarifies.
Good luck buddy