Taxes are not included in the calculation of the refund amount. The 5% refund is only calculated on the order amount. For example, a customer purchased a pair of AD80 and a dumbbell stand, the total amount was $1004, used a $20 coupon, and paid $60 in taxes. Then the refund amount for self-pickup is: (1004-20)*5%=$49.2. In short, it has nothing to do with the taxes paid.