I am currently on F-1 visa on OPT working for a employer who plans to apply for my H1-B this april. I have also applied to a few schools for continuing my studies further. My question is how will be affected if i do get approved for H1b visa by USCIS and then i decide to continue school which is likely starting in august. Do i have to apply for another COS after I get H1b approved to go back to F1 to continue school ? Do i have to leave the country and get a new visa?