My H1B got approved first (also applied for the STEM OPT extension too). I got confused here, as I talked to my DSO, she said SEVIS will automatically complete my I-20 status as “change of status”, and OPT will be cancelled (can not have 2 status at the same time). My question here is, do I need to contact USCIS for the cancellation of OPT extension or It already got cancelled due to the change of status as a H1B. I would really appreciate if anybody would clarify on this issue. thanks.