My client lives in Washington State and they have destination-based sales tax, meaning anytime they ship something to a customer within the state, taxes must be calculated based on the customers address (not just zipcode - that would be too easy). It's my understanding that roughly 20 states are now doing this with new ones adopting the process monthly.
This isn't something to snub our noses at -- it's the law in many of our states and our clients can get into serious trouble if they don't comply. Disappointingly I've emailed Exp:resso about this issue three times now asking for help and even offering to pay them to develop this, but have received zero response.
Does anyone have a solution for this growing problem?