今天收到I-485 approval notice了。其中有这么几句：
Prior to receiving your permanent resident card you may be required to report for biometrics processing (photo/fingerprint/signature). Please do not take any action at this time. If you are required to report for this processing, you will receive another notice advising you of the date,time and location to appear.
问题是，我2周后要回一趟国，9月下旬回来（我有AP）。我想知道我需要做biometrics processing 的概率大吗？如果概率大，我就考虑改机票了。多谢。
我的I-485在USCIS的on-line status is : post decision activity