H4 visa drop box appointment on 07/22

I am opting for my drop box appointment on 07/22 and would love to understand if I can put in an NIE letter stating that I am currently studying as an H4 domestic student and my classes start in August. Or should I wait for my visa to get stamped and then email for my NIE application. Please suggest as my classes start from August

You can attach the NIE letter with proof of your enrollment of fall classes.