[ic] express checkout sales tax display and calculation

[David]

> refresh the displayed sales tax in the shopping cart portion when the 
> state is changed and prior to final order placement?

I am not sure if it is still valid but previous versions used: 
onChange="this.form.submit()"

So the following might work ...
[display name=state type=state_select onChange="this.form.submit()" 
value="[value state]"]

David