Yesterday I did following:
I've withdrawn around 70.000 gold to buy herbs for our guild bank.
New herbs cost around 65.000 gold, so I had 5.000 remaining in my inventory.
When I repaid those 5.000 gold the addon noticed that and now I have a negative balance, meaning I don't need to pay taxes for some time.
It would be nice to have a way (except changing lua files in SavedVariables) to reset data for a character. :-)

Hi!

Sorry, but I don't play wow :( And can't fix it. This repo I will keep so somebody can join development.