YES

Thanks Milbo - I appreciate your help a lot.

I have tested 3.4.5.10063 on our test site (also with a mix of categories and shoppergroups) and I can confirm that all amounts/total amounts are now

correct calculated if you use

Calculations rule for VAT: 'Tax per bill'

Calculations rule for discount: -% 'Price modifier before tax' (is per product)

Calculations rule for discount: -% 'Price modifier before tax per bill'.

But you are right you can't edit an order without screw it up - in our case it is not a problem - we don't edit orders in Virtuemart.

If you wants some screenshot and explanations how it act - please let me know.

...the shipment radical vat setting - I managed to make a test in demo shop with differentiated VAT rules and the 'Simplified VAT for shipping' enabled,

I can tell that if you use

Calculations rule for VAT: +7% 'Tax per bill'

Calculations rule for VAT: +10% 'Tax per bill'

Calculations rule for discount: -% 'Price modifier before tax' (is per product)

Calculations rule for discount: -% 'Price modifier before tax per bill'

it does not work properly. In Denmark we do not have differentiated VAT - we only have the 25% rate so in our case it is not a problem,

we do not use the radical vat setting. I know that "it does not work properly" is a very short comment for a test. If you wants some screenshot and explanations how it act - please let me know.

Time to rewrite the calculator

I can imagine that it is hard to write with all these opportunities available. Please have in mind that it is important, in cart and order confirmation, to tell/display for

customer/shopper what discount they get - especially the per bill rules.