If I have my certificate of naturalization, obtained through my parent, do I still need certificate of citizenship? If so, how do I obtain it?

Hello, If you have an U.S.naturalization certificate in your name, then you do not need a certificate of citizenship and you do not need to apply for naturalization and take the civic test. You may simply go ahead and apply for a U.S. passport. A quick way to apply for a U.S. passport is to visit your local post office that handles passport applications to obtain the forms and filing instructions. Notes: This information is of a general nature and is not intended to be legal advice. You should consult with an immigration attorney for legal advice about your specific situation.