Hi Scott,

I seem to be in a minority with regards to this not adding up properly so I am sure it is something I am doing wrong.

When the cart doesn't include the better together discount it adds up correctly, when it does include a BT discount the VAT is wrong?

The settings:
Include Tax: True
Re-calculate Tax: None

Using $this->add_cat_to_cat(67, 68, "%", 20);

The cart prices are displayed including VAT. Site is UK (if that makes a difference)

So have I missed something obvious?