If you pre-purchase the wine package the 15% gratuity IS charged.  It is included in the price.   If you purchase on board, the price is less but then the 15% gratuity is added so the price works out to be the same as the pre-purchased wine package.   No, there is not sales tax applied to wine packages.  HAL processes the charge when you are out of waters where tax must be levied.  This is why you sometimes don’t see the charge for 2 or 3 days 😉 (Spanish waters are a good e