You can apply for tax refund in advance at designated locations in Seoul: Tax Refund in downtown Seoul

Credit card tax refund means that you can pre-charge the tax refund amount with your credit card and then refund the tax refund on the spot. After you have gone through customs and completed the formalities, the credit card pre-swiped amount will be refunded~~

The specific tax refund location in downtown Seoul can be found on Baidu Korea Shopping Tax Refund System~