Tao is either Bang's only disadvantageous matchup or one of two (The other is maybe Litchi). Recognize it's difficult, but far from impossible. A lot of this matchup is weathering the storm, almost like you're suddenly Tager. You have no way to get out of her blockstrings, her damage is huge, and if she knows how to get fake oki you don't even get out for getting hit. It's very tough. Your 5A is next to useless in this match, and your 5B is situational. Don't be afraid to use TK dnails instead of a poke, you will often connect for a combo with knockdown, which is KEY. You get her on the floor, try not to ever let her up, using as many Dnail resets as it takes.
Also, do not stagger. Any time you try to use (x blockstring > pause > 5A) Tao can just push 2A. But you can fake it with things like 5A 2A 2A 2B, giving him a gap to mash with a move that crushes low profile powerfully.
GL