> ## Documentation Index
> Fetch the complete documentation index at: https://docs.smartsend.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Customs
> Configure customs information in Shopify
Selling internationally often requires you to provide customs information to the carrier for each shipment.
This page explains how to properly fill out the customs information in Shopify.
The Smart Send Shopify App will make sure to include a product's customs information properly when booking shipments.
Read our detailed article for tips and guidance on customs requirements and best practices.
## Add product customs information
To ensure smooth customs processing, you need to provide standardized customs information for each product. This includes the *Harmonized System (HS) code* and the *country of origin*.
HS codes are internationally recognized numbers that classify traded products. Some countries require country-specific tariff codes, which often extend the standard HS code system.
We recommend adding a general 6-digit HS code to all products and region-specific codes to the destinations where this is required.
### Add general customs information
Follow the steps below for adding general customs information to a product in Shopify or see Shopify's documentation on HS codes for more information.
Go to the **Product** in Shopify Admin or the **Variant** if the product has multiple variants.
Locate the **Shipping** section.
Select the *country of origin* and search for the appropriate *Harmonized System (HS) code*.
### Add region-specific customs information
After adding the *general customs information* click the three dots next to the **Harmonized System (HS) code** field and select **Add HS codes by country/region**.
**USA**: As of August 2025, the United States requires a country-specific HS code following a policy change by the Trump administration.
This means that you should add country-specific tariff codes for the US. These codes are often 10 digits and extend on the HS codes.
### Add region-specific customs information
After adding the *general customs information* click the three dots next to the **Harmonized System (HS) code** field and select **Add HS codes by country/region**.
