Quote Originally Posted by carlwhat View Post
i hate coupons.

looking at this outstanding PR here:

https://github.com/zencart/zencart/pull/4324

i wanted the coupon amount to be included into the order info array.

this amount would then be used in any of your various ot tax modules to reduce said tax by that rate * the coupon amount.

i am not sure if that helps with your question, as i am not in a position to answer how it is 'supposed to work' nor what are the 'expected differences'.

best.
They're not my favorite, either.
Quote Originally Posted by swguy View Post
ReCalculate Tax = None vs Standard

For Standard, it goes through the products list and for taxable products, computes the updated tax based on the discount provided by the coupon.
Finally, the tax line(s) are updated based on the new computation.
I got that, I'm looking for the processing difference between the "None" and "Standard" settings since "None" is how the client's got their coupons currently set up.

I'll note that the coupon calculations are off using the "Standard" setting as well when a site's products have multiple, additive tax rates that apply.