IOSS is a VAT arrangement for qualifying imported distance sales; it is not a general customs-duty exemption. For China-to-EU small parcels in October 2026, the former low-value duty relief should not be assumed to continue. Keep VAT collection, the applicable customs duty and the declaration data as separate parts of the dispatch process.

Check whether the sale qualifies for IOSS

Irish Revenue's IOSS guidance explains the scheme for qualifying consignments with an intrinsic value not exceeding €150 and excludes excise goods. The scheme concerns VAT on eligible sales, not every type of imported movement.

Confirm who is responsible for the sale's VAT treatment. A marketplace may have a different role from a seller making direct sales. The warehouse should receive the approved transaction data and instructions, rather than decide the tax position from the parcel's appearance.

Review the actual combined consignment. Combining products can change its value and eligibility. Do not split or undervalue orders merely to produce a preferred tax result.

Apply the 2026 customs change separately

The European Commission's current low-value duty guidance describes the temporary €3 duty introduced on 1 July 2026 for covered low-value distance-sale consignments. Its calculation is based on tariff-classification items rather than the number of physical units. VAT and customs duty must therefore remain distinct in the cost model.

Have the declarant confirm the applicable classification and treatment for the actual contents. A parcel containing different product types may not have the same result as a parcel containing several units of one classified item. Do not substitute a flat per-parcel assumption for the official rule.

Agree who declares and settles the amount and how that evidence reaches the seller. A label saying IOSS does not, by itself, establish that every customs obligation has been completed.

Keep the identifier in the correct data channel

The valid IOSS information needs to reach the party making the applicable declaration through the agreed electronic process. Treat the identifier as controlled transaction data, not marketing text to publish on a product page or a universal number to put on every package.

Confirm which provider receives it and how the order is linked to the shipment. If the route or service changes after the label is created, check whether the new declarant still has the required data.

For FulfillNexa by SBT's China dispatch operation, the seller's approved VAT and customs instructions should travel with the specific order record. The warehouse's packing role does not automatically make it the seller's tax representative.

Make the product record precise enough to declare

Use a meaningful description, quantity, value, origin and the required classification information. Keep materials and product identifiers where relevant to compliance. Avoid placeholders such as accessories when the goods can be described accurately.

The Commission's guidance also identifies a forthcoming product-identifier requirement from 1 November 2026. Check the current implementation instructions with the declarant before that date rather than assume that an old data file will remain sufficient.

Keep packing and transaction records consistent. A substituted SKU can change the declaration data even when the customer's order value is unchanged.

Investigate a second VAT demand before promising a refund

If a customer is asked to pay VAT after the sale, gather the checkout tax record, shipment reference and the actual assessment. Determine whether the issue concerns missing IOSS data, ineligible value, a different charge or a declaration error.

Do not assume that every arrival payment is duplicate VAT. Customs duty and carrier handling fees can be separate. Ask for the breakdown and follow the appropriate seller, provider or authority correction route.

Customer communications should explain the action being taken and who needs to supply evidence. Repeating that VAT was prepaid without checking the shipment data does not resolve the underlying problem.

Test the electronic handover

Before expanding volume, run representative orders through checkout, warehouse release, provider data transfer and arrival. Reconcile the tax record and the declared shipment, including a multi-product order where classification matters.

The operational objective is a traceable sale-to-declaration link. IOSS can support that process for eligible sales, but it should not be used as shorthand for duty-free, automatically cleared or compliant with every EU product rule.

Sources and verification links

Operational rules can change. Check the linked primary sources and confirm shipment-specific requirements before booking.