My spouse and I are already 5yrs as a permanent resident. Now we plan to fill out N400 form and apply for US citizenship. Can we do this together? I mean go thru the process like send applications, biometrics, naturalization interview, etc together? If so, how should we do it? Does USCIS treat US application per forms submitted or married couples can be scheduled together? Please advise and I'm in the bay area if that matters.