Customs guides for small sellers
The rules that decide what your parcels cost and whether they arrive, written for people who ship a few parcels a week.
- Royal Mail DDP to the USA: how duty-paid shipping works for small sellersWhat Royal Mail's duty-paid service charges, the data it needs on every parcel, and how to price US orders so the duty doesn't eat your margin.
- CN22 or CN23? How to fill in a Royal Mail customs form in 2026Royal Mail moved almost every parcel to the CN23 on 1 June 2026. Each box explained, with examples for handmade products.
- How to find the HS code for any product (a seller's guide)How customs codes are built, how to pick the right one in four steps, and the free official tools that confirm it.
- US import duty calculator: what a parcel to America costs in 2026Work out the US duty on one item in seconds, then see how base rates, Section 301 and Section 232 add up, with worked examples.
- Shipping to the US in 2026: duty, codes and Etsy's DDP ruleThe three rule changes that moved US customs onto small sellers, in the order they hit your parcels.