H1B 急问

I filed my application last week. I am F1 now, and my wife is F2. I am applying H4 for my wife at the same time. does we need to send her copy of I20 (dependent copy) or my I20(s) are enough, I sent only my I20(s) out last week. So worried.

请有经验的大侠指教。多谢了。