" H-4 visa holders may attend U.S. schools and colleges, but are not authorized to work in the United States ".
That's the info I got when I surfed the net ....So Iam not sure if you'll need an I-20 . Did you speak to the school you plan to join ?
Too bad they are delaying the I-20 process, eh , I havent heard about it so far . Do you have a link to the article ?