Punishing Tag ins?

Once you have an opponent that you know is going to tag in a partner (cross over attack) and they do a normal tag in, whats the best punish to this? Im under the assumption that a normal tag is very unsafe. Problem is everything ive tried thus far results in the opponent blocking. How many frames are they vulnerable for? Is there a certain amount of frames as to which they can get hit? Can they be hit in the air or air thrown while the jump in? Thanks for any help.

Tag ins hit high in this game, so just stand block. On block you can do anything and if you’re full screen away you can even dash up and punish.