There are many resources available online to learn about chocolate tasting. Here are a few websites that may be helpful:

1. International Chocolate Tasting Institute (ICIT): This website offers a wide range of resources for learning about chocolate tasting, including a chocolate tasting wheel, a glossary of chocolate terms, and a guide to hosting a chocolate tasting event.

2. The Chocolate Tasting Club: This website offers a variety of resources for learning about chocolate tasting, including a chocolate tasting wheel, a guide to hosting a chocolate tasting event, and a blog with articles about different types of chocolate.

3. The Chocolate Academy: This is the website of Barry Callebaut, one of the largest chocolate manufacturers in the world, offers a variety of resources for learning about chocolate, including a chocolate tasting wheel, a guide to hosting a chocolate tasting event, and a blog with articles about different types of chocolate.

4. The Chocolate Society: A UK based organisation, provides a variety of resources for learning about chocolate, including a chocolate tasting wheel, a guide to hosting a chocolate tasting event, and a blog with articles about different types of chocolate.

5. The Ecole Chocolat: This is a chocolate school based in Canada, offers a variety of resources for learning about chocolate, including online classes, workshops and chocolate tasting events.

6. The Speciality Chocolate Association: A global organisation that supports chocolate makers and chocolate lovers, provides a variety of resources for learning about chocolate, including a chocolate tasting wheel, a guide to hosting a chocolate tasting event, and a blog with articles about different types of chocolate.

It's worth noting that many of these sites are oriented to professionals in the chocolate industry but offer a lot of resources that are useful for anyone interested in learning more about chocolate and its tasting.