Forget that you even have a 3C in this match up.
To elaborate a little, Tao is going to spend the majority of her time in the air zipping around you driving you nuts. This makes things like 5/6A very useful tools.
When under pressure, don't try to mash at all, you'll lose. Instead, a well timed 2D or 5D will help out a lot, especially since many Tao players tend to be very aggressive. A couple of these will help to condition the Tao player to give you some space to jump out instead.
The name of the game is very similar to Valk or Noel, you're going to want to get that first knockdown or confirm, and pile on the pressure as much as you can from there on. Shutting down rolls and upbacks are going to be key.
I can't really be too specific or technical, because most of my matches against Tao have been won from mostly mashing j.B > 5C and praying I get lucky with a hit while she's in the air near me.
At least some consolation is that she goes down fast once you do catch her because of her incredibly low health.