Al wrote:
I am using the sales invoice template and I am trying to customize of
course.
What I want to do is have the tax rate (5.5%) automatically put in if the
state that the order is coming from is WI.
Can't quite figure out how to do the formula/function

Maybe something like this.... If A1 constains the state (WI), try:

=if(A1="WI", 5.5%, "")