Taxes for International sales

Hi, I was hoping to get some clarification on taxes. I learned through access to your forum that I only need to concern myself with Illinois state sales tax because that is where I am located. Right? My question is do I also need to apply taxes for sales outside the US. For example, sales in the EU. can anyone give some advice on taxing outside of the US (internationally) or perhaps direct me to a useful web site. :blink:

THANKS