回复：回复：谢谢，我现在就在网上申请。

N-400 filing fee is $595 (Add $85 biometric fee for a total of $680), not $169. Also, you can not file N-400 or N-600 online (not online filing available).

See:

http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=480ccac09aa5d010VgnVCM10000048f3d6a1RCRD&vgnextchannel=db029c7755cb9010VgnVCM10000045f3d6a1RCRD

 

See this website for N-600 filing:

http://www.uscis.gov/portal/site/uscis/menuitem.5af9bb95919f35e66f614176543f6d1a/?vgnextoid=a936cac09aa5d010VgnVCM10000048f3d6a1RCRD&vgnextchannel=db029c7755cb9010VgnVCM10000045f3d6a1RCRD