Hi Stan,
We face a problem with the calculation of the tax in the latest OPC versions:
More specifically, we get for example (Using 10% discount coupon and 'Subtract payment discount before tax,shipping'=YES and 'Shopper group see prices including tax'=NO) :
Subtotal€148.00
Coupon Discount-€14.80
Shipping and Handling Fee€30.75
Tax Total€26.81
Total:€190.76
Above calculation is wrong! The correct should be:
Subtotal€148.00
Coupon Discount-€14.80
Shipping and Handling Fee€30.75
Tax Total€24.59
Total:€188.54
The mistake here is that OPC calculates the tax on the UNDISCOUNTED subtotal (i.e. on the €148) which is wrong! The tax should be calculated on the DISCOUNTED subtotal, i.e. on the €133.2 (=€148-€14.8)
This was working in the previous versions; we'd appreciate your fix as soon as possible as we get compaints from our customers, thanks!
Regards,
Chris