I cant see who your father is as your own profile is Private. If he has no death date and was born in the last 100 years the privacy options are restricted. Nevertheless, you can use the "Yellow" level which does not restrict the info in the Biography level.
Of course, you also have to be logged in to do any editing at all.
If you are not on the Trusted List, you may have to ask to be placed on the Trusted List for editing.