lg,我,女儿可以一起申请?申请费是怎么算的?3X725?
儿子自己申请,单独填N400?单独交费?725?
-You, your spouse and your son file N-400 with the filing fee, respectively (i.e. 3 N-400 filings). If you or spouse take the oath (i.e. become a US citizen) before your daughter turns 18 years old, then she will be the US citizen automatically. Otherwise, your daughter has to file N-400 after she turns 18.