设置征税服务
在设置税务计算服务之前，请确保：
您已获得要为其启用税务计算的每个州的州税务登记号。请参阅州税务登记号，了解更多信息。
您已查看并了解商品税务代码如何影响订单的税务计算。请参阅商品税务代码，了解更多信息。
您已了解从专业销售计划降级或关闭账户所带来的影响，这样做将取消您的征税服务登记和相应的税务设置。请参阅降级/升级和税务计算，了解更多信息。
按照以下步骤配置或修改您的税务计算设置：
在卖家平台中，前往设置下拉菜单，点击税务设置。
如果您是老用户，请跳过步骤 3。
如果您是新用户，则需要按以下步骤操作：
查看亚马逊计税方法文档。该文档介绍了亚马逊如何计算您的税务。
查看可用的商品税务代码。以下是可征税性规则，这些规则可用于分配给单个商品，也可用作所有计算的默认规则。
选择一个州：
请参阅商城服务商页面，了解更多信息。要为一个新的州配置税务设置，请从下拉框中添加该州。
要修改现有州的配置，请在配置框中找到该州。
如果您选择的州显示“对于配送到该州的所有货件，由亚马逊管理销售税和使用税”，您将无法设置管辖权。
州税务登记号：对于选择的每个州，您都需要获取有效的州税务登记号以配置税务管辖权。
如果您没有某个州的州税务登记号，则必须在为该州启用计算服务之前获取其州税务登记号。请参阅州税务登记号，了解更多信息。
要征税的管辖区 - 管辖区选择可告知系统在进行亚马逊支持的计算时要查找的税率。
必须拥有州管辖权才可在州内启用其他任何管辖权。
在我们的第三方服务提供税率时，请选择您希望系统针对其进行计算的所有管辖区（州 + 县 + 城市 + 区）。例如，如果只选择了州和城市，则系统将只计算州和城市的税率。
运费和处理费及礼品包装费可征税性 - 选中框以启用税务计算。
按州指定自定义税率（可选）：
若要仅在需要时使用此选项，请参阅自定义税率，了解更多信息。此功能将覆盖我们的服务提供商提供的所有管辖区税率以及所有商品税务代码（A_GEN_NOTAX 除外）规则分配。
使用此选项的所有计算将仅在州级别进行。
要为州指定自定义税率，请在“自定义税率 (%)”文本框中输入百分比值。
配置默认商品税务代码 (PTC) - PTC 可与您的管辖区设置配合使用，并对税收计算应用税收规则。当商品并未向商品报价详情指定 PTC 时，请使用默认 PTC。如果您没有选择默认 PTC，则应指定商品报价级 PTC。如果二者均未被指定，则使用 A_GEN_NOTAX 值的税务计算的结果为不计税。
从下拉菜单中选择一个默认 PTC。该 PTC 将在商品详情页面指定 PTC 时使用。
如果您不想配置默认 PTC，请从下拉菜单中选择不使用默认 PTC，然后为每件商品指定商品报价级 PTC。
报价详情页面上的商品报价级 PTC 适用于为其指定的商品。
如果未指定默认 PTC 或商品报价级 PTC，亚马逊将始终使用不计税 PTC A_GEN_NOTAX 值，从而导致计算结果为零。 请参阅商品税务代码 (PTC) 页面，了解更多信息。
完成税务设置配置后，点击保存设置。
尽管亚马逊的税务计算服务提供了一种方法来帮助确定和应用订单的销售税和使用税，但卖家仍需自行审核并确定正确的 PTC、计算设置以及其商品的所有相关信息，并需要向相应的税务机构证明和支付其交易（在已颁发商城服务商法规的地区进行的交易除外）应缴纳的所有税费。这同时适用于亚马逊配送的商品和卖家自行配送的商品。如果您对税务计算有其他问题，建议您向您的税务顾问寻求帮助。
亚马逊官网原文详情：
Set up tax calculation services
Before you set up tax calculation services, ensure the following:
You have obtained a state tax registration number for each state you intend to enable a tax calculation. Refer to State Tax Registration Numbers for more information.
You have reviewed and understand how a product tax code impacts tax calculations on your orders. Refer to Product Tax Codes for more information.
You understand the impact of downgrading from a Professional Selling plan or closing your account, as it will cancel your enrollment for tax collection services and your corresponding tax settings. Refer to Downgrade or upgrade and tax calculation service for more information.
Follow the steps below to configure or modify your tax calculation settings:
In Seller Central, go to the Settings drop-down menu and click Tax Settings.
Skip Step 3 if you are a returning user.
Before proceeding to Step 4, first-time users will want to do the following:
Review the Amazon tax methodology document. This document explains how Amazon will make your tax calculations.
Review the available Product Tax Codes. These are taxability rules that you can assign to individual products and use as a default on all calculations.
Select a state:
For additional information, see the Marketplace Tax Collection FAQ.
To configure tax settings for a new state, add the state from the drop down box.
To modify existing state configurations, locate the state in the configuration box.
If the state you select shows 'For all shipments to this state, Amazon manages sales and use taxes', you will not be able to set jurisdictions.
State Tax Registration Number - For each state you select, a valid state tax registration number is required to configuring taxing jurisdictions.
If you do not have a State Tax Registration Number for a state, you must obtain one prior to enabling calculation for that state. Refer to the State Tax Registration Numbers for more information.
Jurisdictions to tax - Jurisdiction selection tells the system what tax rates to look for when making calculations that Amazon supports.
The state jurisdiction is required to enable any other jurisdiction in a state.
Select all the jurisdiction (state + county + city + district) that you want the system to make a calculation for once a rate is available from our third-party service. For example, if only state and city are selected, only the available state and city tax rate will be calculated.
Shipping & Handling and Gift Wrap taxability - select the box to enable tax calculation.
Optional Custom Rate assignment per state:
Use this option only if required, refer to Custom Rate for more information.
This feature overrides any jurisdiction tax rate supplied by our service provider and all product tax code rule assignments except A_GEN_NOTAX.
All calculations using this option will be made at the state level only.
To assign a custom rate to a state, enter a percentage value in the Custom Rate (%) text box.
Configure a default Product Tax Code (PTC) - A PTC works with your jurisdiction settings and applies tax rules to the tax calculation. The default PTC is used when an offer does not have a PTC assigned to the item offer details. If you do not select a default PTC, an item offer level PTC should be assigned. If neither are assigned, the tax calculation result will be non-taxable using A_GEN_NOTAX value.
Select a default PTC from the drop-down menu. This will apply when a PTC is not assigned on the item detail page.
If you do not want to configure a default PTC, select Don’t use default PTC from the drop-down menu and assign item offer level PTC to every listing.
The item offer level PTC on the offer detail page applies to the item it is assigned.
If a PTC assignment is not made at the default or item offer levels, Amazon will use the always nontaxable PTC A_GEN_NOTAX value resulting in a zero percent calculation. Refer to the Product Tax Code (PTC) page for more information.
Amazon Tax Exemption Program - To enroll in the Amazon Tax Exemption Program, select the box next to ‘Enroll in the Amazon Tax-Exemption Program’.
Once you have configured your tax settings, click Save Settings.
While Amazon’s tax calculation services provide a means to determine and apply sales and use taxes to orders, sellers are responsible for reviewing and determining the following:
The correct PTC
Calculation settings
All related information for their products
All tax documentation and payments to the appropriate taxing authorities for their transactions except where Marketplace Facilitator Legislation is in effect.
This applies to both Amazon-fulfilled and seller-fulfilled products. If you have additional questions about tax calculation, we suggest seeking assistance from your tax adviser.
文章来源：亚马逊官方网站
