英国进口 HS 8540910020 需要哪些文件？

通常需要：商业发票、装箱单、提单 / 空运单、原产地证书（如申请优惠税率）。建议向英国海关确认最新要求。

如何计算英国进口 HS 8540910020 的总成本？

用 CIF (商品价 + 运费 + 保险) × 0.00 % = 进口关税。再 + 增值税 (VAT) 20.00 % = 落地总成本。Treayo 提供在线计算器：https://treayo.com/zh/calculator/uk

WCO 分类路径

章85电气机械、电子产品
品目8540热离子、冷阴极或光电阴极管AI 译
子目854091阴极射线管零件AI 译
国家码8540910020Thermionic electron source (emitter point) of lanthanum hexaboride (cas rn 12008-21-8) or cerium hexaboride (cas rn 12008-02-5), with electric connectors - with or without a metal housing, - with or without a graphite carbon shield mounted in a mini-vogel type system, - with or without separate pyrolytic carbon blocks used as heating elements, and - a cathode temperature of less than 1 800 k at a filament current of 1,26 a

8540910020

现行

英国 HS 8540910020 （Thermionic electron source (emitter point) of lant）进口关税是多少？

一句话答案：英国对 HS 8540910020 的进口关税（第三国税率）为 0.00 %，加上增值税 (VAT) 20.00 %。

"Thermionic electron source (emitter point) of lanthanum hexaboride (cas rn 12008-21-8) or cerium hexaboride (cas rn 12008-02-5), with electric connectors - with or without a metal housing, - with or without a graphite carbon shield mounted in a mini-vogel type system, - with or without separate pyrolytic carbon blocks used as heating elements, and - a cathode temperature of less than 1 800 k at a filament current of 1,26 a"

HS 编码 8540910020（第 85 章「电气机械、电子产品」；品目 8540「热离子、冷阴极或光电阴极管」；子目 854091「阴极射线管零件」）在英国税则中对应"Thermionic electron source (emitter point) of lanthanum hexaboride (cas rn 12008-21-8) or cerium hexaboride (cas rn 12008-02-5), with electric connectors - with or without a metal housing, - with or without a graphite carbon shield mounted in a mini-vogel type system, - with or without separate pyrolytic carbon blocks used as heating elements, and - a cathode temperature of less than 1 800 k at a filament current of 1,26 a"。英国海关对该编码商品征收进口关税（第三国税率） 0.00 %、增值税 (VAT) 20.00 %。