What is the procedure to change from F1 to L2 COS

Hi,

My husband is currently in F1. I am in L1 status. He would like to change from F1 to L2. What is the procedure for COS and can he apply for the COS while he is in US and doing his course and get the status approved while he is in US itself.

You will need to file I-539 for COS. COS can be applied only when the person is present inside US and continues to remain inside US until its processing is complete.