title: Where can I find the appropriate tax class ids in Magento database?
body: <p>When I create a product in Magento using the API, I need to supply a field that's called 'tax_class_id'. I want to find out, which id I need to supply for a VAT percentage, like 20% in Austria or 19% in Germany. </p>
  
  <p>Where can I find those ids inside the database?</p>
  
  <p><em>Side note: I actually want to write an api extension that returns a list of percentage values along with their tax class. If someone has an easier idea how to do that, it'll be fine as well!</em></p>