Issues with Absolute Discounts and VAT

I tried searching the forum and wiki for an answer but came up blank. I am on 18.0.4.

In my setup, I am using VAT Tax Rate 1 & 2 to help with calculating State/County taxes and City taxes. I have this working across the board. This is working great so far.

However, when I go to create an absolute discount I find that I cannot figure out how to get that discount to include the 2nd tax rate.

I go to the Third party page and add a discount. The Tax Rate dropdown only shows VAT tax 1.


When I use it on the invoice, it also only calculates that discount using VAT tax 1. I need to add a discount that excludes tax using that tax rate but utilizes tax rate 1 and 2 rather than just 1.

Is there a setting somewhere that I am missing, or is this a bug? Any help or suggestions would be appreciated. I also searched Setup Other and the wiki for VAT and Discounts but couldn’t find any setting anywhere that would enable the absolute discount to calculate both tax rates together.