求翻译：3） 税：台湾的货品税与营收税已包含在定价中，不另加收。部分大型百货商店、品牌专卖店提供5％退税。要求同一天同家商店内购买满新台币3000元以上，持有效证件，正确填写退税单，保留收银条或发票以及未使用的退税物品，在离境日于机场退税柜台办理退税手续。是什么意思？

3) taxes: Taiwan in tax and business tax is already included in the price of the goods, not subject. Some large department stores, brand stores provide 5% tax refund. Requests on the same day in the same shop to buy more than NT $ 3,000, holders of valid travel documents, and correctly fill out the rebate form, retain the cash register or invoice and refund of the unused items to tax refund counter the tax refund formalities at the airport on departure day.