回复：请教各位老师：绿卡回国想办理回美证，按规定必须本人在美国递交回美证申请表

1，如果人现在中国，事先填好表格，飞机落地美国，人办理进关手续之后是否就可以寄出申请表了，不需要等到本人回到居住城市？
-Fine, but why so rush ? You have to have a living address in US for USCIS to contact you.

2，是否必须等到打完手模才能离境？
-Not necessary, but you need to come back to do the fingerprinting if you leave before you do it.