现公司的律师推荐fileAC21to CIS， 刚回了我的信如下：
Yes, we recommend you submit AC21 portability letter to USCIS. We can assist with the process once we receive the go-ahead from HR. We will also need the following items:
1. Your current job title and description;
2. Current annual salary;
3. Copy of I-485 receipt notice;
4. Copy of I-140 approval notice;
5. Copy of certified Form ETA 9089, Permanent Labor Certification;
6. Copy of EAD card; and
7. Copy of your current resume.
由于我年底要被雷，file AC21 还有用吗？一个公司file的，其他以前的公司要补吗？再次感谢了！
