Thanks janos2000, for your reply, but solution is not display prices with IVA included, we need that all prices are without iva and apply it to total of invoice.
We have find a solution, but require modify source code, we have do it, and now freight cost print without iva, and total iva include also freight cost iva. But obviously, ARTIO must solve it and provide a product that work properly THEY must amend bugs and provide source code that work, if finally we must to do THEIR work and modify sources by ourself, its not serious, ARTIO do not provide any support, their products fail a lot, calculations have many bugs and display wrong data, its really a DISASTER of product.
ONLY if you modify by yourself source code, will may do that work properly.
Modifications we have do in source code, to print IVA properly are following, edit invoicehtml.php and change this:
Replace this:
$shippingLine = str_replace($subtotalTag,InvoiceCurrencyDisplay::getFullValue($this->order->order_shipping + $this->order->order_shipping_tax, $this->currency),$shippingLine);
By this:
$shippingLine = str_replace($subtotalTag, InvoiceCurrencyDisplay::getFullValue($this->order->order_shipping, $this->currency, $this->showCurrency),$shippingLine);
Replace this:
$ruleLine = str_replace($subtotalTag,InvoiceCurrencyDisplay::getFullValue($rule->calc_amount, $ruleCurrency),$ruleLine);
By this:
$iva_productos = InvoiceCurrencyDisplay::getFullValue($rule->calc_amount);
$iva_transporte = $this->order->order_shipping_tax;
$total_iva = ($iva_productos + $iva_transporte) ." €";
$ruleLine = str_replace($subtotalTag,$total_iva,$ruleLine);
Attached capture screen of invoice, with our modifications, now IVA print correctly, detail line of freight cost do not include IVA, and IVA 21% total line include ALL the IVA (products + freight cost). We must yet translate some texts like "Total Net" to "Base Imponible", but now calculations are right, at least for payment system that do not include any special charge like Paypal, but for payment by Bank transfer or Western Union, calculations and print is now right.
If payment by Paypal, probably will need some more source code modifications to print IVA properly, we are working with it.