[Coupon discount not applied to tax]

Tax is applied to all products with 10% of product price.

Discount coupon 15% should apply to tax and shipping as well but only product discount applied.

[Coupon discount not applied to tax]

Hi,

I am using cubecart 5.2.1 and created 15% coupon. We want to make discounts on total prices including tax and shipping but this coupon ONLY applies product price only.

It does not discount on shipping and tax. The tax prices is calculated on original price without discount applied.

How do we fix this problem?

For example, 

Product Price $30.60

Shipping $14

Tax $4.46

Total $49.06

And then discounts 15% from total amount so it should be $7.359 discount NOT discount $4.59

Can you please help me?