UK Sellers Face New US Customs Code Requirement for Parcels Under Tariff Changes

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A UK craftsman who sells wooden curtain poles on Etsy describes new rules requiring a 10-digit US customs code on every parcel shipped to America. The end of the $800 duty-free threshold in August 2025 and Etsy's duties-paid requirement from 9 July 2026 have made accurate classification costly for small sellers. The US Postal Customs process also began requiring the codes on 24 July 2026, drawn from a schedule of roughly 20,000 lines. To address this, the author built Tariff Desk, a fine-tuned 8B model that suggests codes, matches rulings from US Customs about two-thirds of the time, and asks clarifying questions when descriptions are vague. The tool is offered free, with paid packs and plans aimed at sellers and their assistants.

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