我給妹妹辦移民，I130 approved。 2020年11月，case has been transferred to GuangZhou. 有兩個問題請教8老師：
1. 我妹妹的女兒的名字加在I130上的，在NVC網上也有她的信息。但她現在已經超過21周歲，未婚，還可以和妹妹一起進行下一步嗎？
-Depends. Calculate the child's CSPA age using this formula:
CSPA age = the child actual age when the priority date is current (based on A Form in Visa Bulletin) - the I-130 pending dates
Note: I-130 pending date = I-130 approved date - I-130 receipt date
(I-130 approved = the I-130 approval notice issued date)
If the child's CSPA is less tha 21, then the child is not age-out and thus, the child can immigrate with the parent. Otherwise, the child cannot use the immigrant benefits as the parent's derivative.
下一步是繳費，但不確定女兒是不是可以一起繳費辦理。
2. 我妹妹現在在中國，妹妹的女兒現在在美國境內，學生身份，用OPT工作。如果她可以和她媽媽一起辦，她需要回國辦理嗎？還是可以在美國境內申請？
-Either way is OK if the child is not age-out. If the child wants to file I-485 within US, she ahs to keep the non-immigrant status such as F-1, H-1, until she files I-485. She cannot file I-485 until her mother enters US using the immigrant visa.
多謝！
