With April 1st coming closer to file for H1-B visa i am little worried about my situation. So just to satisfy myself i have few questions. My OPT expires on May 31st.  I am going to send my new I-20 within the end of this week or early next week so that he can send them with other documents.

So my questions are:

1. If my H1 is approved will they send new I-94 along with that or do i have to apply for that too?

2. Since I am applying for master's quota. Do you guys by any chance know what is the minimum salary requirement to get approval for h1-b visa?

3. And also is it fine to send new I-20 while we apply for h1-b visa to bridge the gap between june and oct?

4. If i send my new I-20 will my OPT expire?

Thank you very much