u/Acceptable-Wheel-961

HI all
I recently found out I’m eligible for stem extension and wanted your help to know the timeline and the process and everything I should keep in mind while applying.
My initial opt expired September 28 2026
I already received the signed training plan from my employer but haven’t yet applied to the school for the new I-20.
Can someone help me with the next steps and everything I must know before moving on?