Well that was easy! Comment out one line in includes/modules/order_total/ot_onetime_discount.php. Enter a negative number for an after-tax discount; enter a positive number for an after-tax cost increase. Line 91 in EO v4.3.1 (shown below).
Code:
// if($discount > 0) $discount = $discount * -1; edit to allow after-tax discount (-) or cost increase (+)
Text can be changed by overriding the file: includes/languages/english/modules/order_total/ot_onetime_discount.php
Do you see any problems with this change?
Dave
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