自定义税率
重要： 本页信息不构成税务、法律或其他专业建议，也不得用作此类用途。如有疑问，请咨询您的专业顾问。
亚马逊税务计算服务提供了自定义税率选项，可供您指定静态百分比，从而对发往特定州的订单计算税费。自定义税率将覆盖您的商品税务代码 (PTC) 规则（假期销售税、优惠税率等）以及税务软件提供商提供的司法辖区税率，我们将在州级别计算您的自定义税率。
自定义税率是对我们服务的调整。您必须在商品和/或自定义税率可以覆盖的默认级别指定商品税务代码。自定义税率选项不会覆盖分配的 PTC“A_GEN_NOTAX”（指定为“始终免税”的商品）或零税率司法辖区（采用零税率的州辖区，如俄勒冈）。
根据税务计算服务的相关条款，如果您指定自定义税率来计算税费，则必须如实设置，确保其准确反映司法辖区的实际销售税率或使用税率。
要为各个州指定自定义税率，请按以下步骤操作：
在卖家平台中，前往【设置】。
点击【税务设置】。
添加州或找到您想要添加自定义税率的现有州。
找到【自定义税率】列，然后点击【点击以指定自定义税率】。
输入您的自定义税率 (1% - 15%)。
阅读并点击以接受【征税方法和服务条款】。
点击【保存设置】。
您的自定义税率将仅在州辖区级别计算，而 PTC 将在您的销售税报告中显示为 A_CUSTOM_RATE。
无论您是否参与亚马逊税务计算服务，除了计算、缴纳和报告义务范围内的所有税费之外，您还应负责确定自己的纳税义务。有关更多信息，请参阅我们的税务政策。
亚马逊官网原文详情：
Tax Custom Rate
Important: Information on this page does not constitute tax, legal, or other professional advice and must not be used as such. You should consult your professional advisers if you have questions.
Amazon's Tax Calculation Service has a custom rate option that offers you the ability to assign a static percentage to be calculated on orders destined to a specific state. A custom rate will override your product tax code (PTC) rules (sales tax holiday, reduced rate, etc.) and jurisdictional tax rate(s) supplied by our tax software provider with your custom rate to be calculated at the state level.
A custom rate is an override to our service. You must have a product tax code assigned at the item and/or default level that the custom rate can override. The custom rate option will not override PTC assignment A_GEN_NOTAX (items designated as “Always Non-taxable”) or a zero rated jurisdiction (state jurisdiction with a zero tax rate, such as Oregon).
Per your Tax Calculation Services Terms, if you assign a custom rate to calculate tax, you must in good faith set a rate that accurately reflects a jurisdiction’s actual sales or use tax rate.
To specify a custom rate for individual states, follow the steps given below:
In Seller Central, go to Settings.
Click Tax Settings.
Add a state or locate an already existing state, which you would like to add a custom rate.
Locate the Custom Rate column and click Click To Assign Custom Tax Rate.
Enter your custom rate (1% - 15%).
Read and click your acceptance of the Tax Methodology and Service Terms.
Click Save Settings.
Your custom rate will calculate at the state jurisdiction level only and the PTC will appear as A_CUSTOM_RATE in your sales tax report.
You are responsible for identifying your Tax obligations in addition to the calculation, remittance, and reporting of all taxes within your obligation, regardless of your participation in Amazon’s Tax Calculation Service. For more information, see our Tax Policies.
文章来源：亚马逊官方网站
