Using OSCommerce 2.3.1 - service provider allows only this version.
Tax rates, zones, class are setup in Location/taxes module. sub-total, shipping, taxes and total are set for display yes and in the priority order listed above.
I assume product net is product price and product gross is price+tax. Gross gets calculated currently based on tax rate.
The shipping, subtotal show up correctly in cart. Taxes and total do not show up in cart.
Total with taxes doesn't show up in cart or even when payment is done using paypal
How to get taxes show up and get calculated in cart and when pay with paypal is clicked?