By my lawyer's comment before.
You can select H1B start date, but you have to go out of US to active the visa. It's applying a new visa.
Also you can just change visa type from F to H. You do not need to go out of US. But you can not specify the sarting date.
You can select H1B start date, but you have to go out of US to active the visa. It's applying a new visa.
Also you can just change visa type from F to H. You do not need to go out of US. But you can not specify the sarting date.