Whichever path you choose, they're all going to want their pound of flesh, so to speak.
The Taxman has already stated that he wants a favour from Anna in return for his help.
She's already been with Carl, but no doubt he will ask for something else, as well.
And who knows what nefarious schemes Earl has in mind?
You can promise to help him, but then betray him, but I don't know how that works out.
It seems to me like he's going to use Anna, no matter if she helps him, or not.
Hope this kinda helps shed some light on this?
Zara Scarlet will probably know more. Zara?