If it's a tax then it's not ZOS who added it, that would be the government of wherever in the world you live. You'll have to ask them what they've changed that an MMO subscription is now taxable when it wasn't before.
PC EU player | She/her/hers | PAWS (Positively Against Wrip-off Stuff) - Say No to Crown Crates!
"Remember in this game we call life that no one said it's fair"