回複：請教專家，申請美國公民，在網上填N400表，咋要收取199刀費用呢，是我理解錯誤嗎，謝指教

You went to a fraud website and I have heard several people were cheated at that website.

Here is the USCIS official website for N-400:
http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=480ccac09aa5d010VgnVCM10000048f3d6a1RCRD&vgnextchannel=db029c7755cb9010VgnVCM10000045f3d6a1RCRD