The two sides signed the exchange of notes on granting zero-tariff treatment to the exports of some Afghan goods to China, covering more than 4,000 taxable items.

中阿双方签署了中方给予阿富汗部分输华商品零关税待遇换文，涵盖4000多个税目。

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Goods purchased or taxable services used for non-taxable items;

用于非应税项目的购进货物或者应税劳务；

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Taxpayers who import taxable items shall calculate tax in accordance with regulations, following Customs clearance.

从事进口应税产品的纳税人，应在产品报关进口后，按照规定计算纳税。

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The thinking is that in-game trades of virtual items like swords are not taxable events, but in-game sales of items for virtual currency are taxable events.

FORBES: Taxing Virtual Worlds

The tax code is so convoluted that many people struggle through the ins and outs on which form to report income, which schedules to deduct expenses or even which items of income are taxable and which expenses are deductible.

FORBES: Pro Athlete Tax Returns Illustrate Complexities of U.S. Tax Code