Ok, I have run a billion-n-one test transactions, with every setting toggled

. Here is what seemed to make a difference and make it all add up...
In Admin >modules >order total >discount coupon >edit
I changed the:
Re-calculate Tax
Standard
toggle to:
Re-calculate Tax
Credit Note
and selected the 'taxable goods' under tax class. Can it be that it was that easy? Well, a billion toggles into it easy was not on my mind, but... give it a try, see if that helps others in the same predicament.
Oh, and it seems it was not even showing tax since there was a negative amount shown before

-- if I add more items to my cart it shows. It apparently IS in the tax configuration, just not what I first thought...
Let me know if there is some reason that should not fix it or if there is something I have missed in my tally.
