I think I-539 allows you to change or extend status. OPT is not a status but a work permit under F1 category for definite time period. If it expires, I don’t think it can be extended but you can change from F1 to B1/B2 (for example)Fair enough, thanks for the reply. Either way, curious about i-539 form being used to extend OPT? Does anyone have any experience with this?