Why is this not working?

[Illyahr]

So I'm setting up a feat that gets harder to take as you get more of them but having trouble with the scripting

var void as number
var tao as number
void = hero.childfound[xVoid].field[hTotal].value
tao = hero.tagcount[User.Tao] * 3
tao = tao + 5

if (void >= tao) then
  @valid=1
endif

I have the feat apply the [User.Tao] tag at First/1000.
Each additional taking of the feat requires your max void points to be 3 higher. Any advice is appreciated