Can I preview invoice changes with coupons applied?

Unfortunately, at this time we do not offer the ability to preview the next invoice with coupons applied. This is due to the possibility that changes may occur in the time between displaying the invoice preview with the coupon applied and the time it takes for the coupon to expire. It is possible other changes may effect the price of the invoice as well so for the time being, the ability to display the invoice preview with coupons applied is unavailable.