Clearly you're going to need to track all of your in-game auction house sales from here on out.  That Ghost Iron Ore you are mining is now income and therefore subject to up-front taxation the moment you click a node. 

To be safe, you may want to bookmark The Undermine Journal on all of your web-connected devices. You're going to need to know the price of that ore each time it's snatched from Azerothian soil.

Do your civic duty and learn to love tracking 1/1000 penny transactions.

Maybe the well project grabbed someone's attention.
http://worldcoinfoundation.org/en/news/worldcoin-initiatives-first-fundraiser-worldcoin-well