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Customs software · E-commerce

Customs Declaration Software for E-commerce Businesses

Get the customs detail right behind the order volume, and file it yourself. Your team prepares and submits GB customs declarations straight to HMRC from product data, shipment documents and structured files, on one account you fully control, with every order, return and replenishment run visible in one place.

  • File in-house on CDS
  • AI document processing
  • Bulk CSV/Excel upload
  • Stock, sales and returns
Bring your filing in-house
  • Upload a replenishment order from your storeTurn a store export into goods items in one step, merging rows that share a commodity code and origin.
  • Turn store titles into customs descriptionsYour team writes clear descriptions from the product data and sees which lines still need detail.
  • Set packaging once for the whole orderApply packages, marks and mass to every checked goods item in a single step.
  • See every status update as it arrivesFollow the import to clearance, so your warehouse knows when stock can move.

In a nutshell

E-commerce creates three very different customs questions: stock you import in bulk to a Great Britain warehouse, sales that leave to customers overseas, and returns that come back. Each needs its own facts, evidence and filing route, however similar the orders look in your shop platform.

Customs Declarations UK lets your team file in-house: prepare and submit GB Customs Declaration Service (CDS) declarations directly to HMRC, with AI document processing and bulk CSV/Excel upload to cut re-keying. Product records are reused from one filing to the next, so every flow gets faster.

You decide the treatment of each movement, the platform guides and checks it, and our UK team supports you from onboarding onwards. Tell us if your model relies on EU low-value or parcel datasets and we will confirm the scope for your flow. Accounts are activated instantly, with no monthly fee and no minimum volume.

Why e-commerce is different

High order volume, thin customs data.

Shop platforms are built to sell, not to describe goods for a border. CDUK closes that gap with guided wizards and checks that turn catalogue data into declaration-ready detail.

  • Stock and parcels are separate workflows

    Importing inventory into a GB warehouse in bulk is a different filing from sending one consumer parcel. CDUK guides you through each route, so you set the movement, the importer or exporter and the delivery terms once and file.

  • Catalogue titles are not goods descriptions

    “Premium essentials” tells a customer something and tells customs almost nothing. The declaration needs material, function or composition, and CDUK’s commodity lookup and validation help you capture it on every line. Once a product is described properly, it is saved and reused on later orders.

  • Returns need their own evidence

    A returned order has to be tied to the original movement. With every declaration kept in one searchable history, you can link a return back to the export it relied on and keep the evidence together.

  • Marketplaces and multiple channels

    The same product may be sold through several storefronts, each with its own export format. Bulk CSV/Excel upload and reusable product records give you one consistent source for every channel you file from.

  • Supplier documents arrive in many shapes

    Commercial invoices, packing lists and spreadsheets from factories rarely share a layout. AI document processing turns them into a reviewable draft, so your team spends minutes checking instead of hours typing. There is no per-document fee.

  • EU low-value datasets, scoped with us

    IOSS (Import One-Stop Shop) arrangements and EU low-value declaration datasets are confirmed with our team for your lane. Tell us how you sell into the EU and our UK team will confirm what your account covers, so you can plan before you commit volume.

Three journeys

Start from the movement, not the order.

Stock in, sales out and returns back each have their own checklist. CDUK walks your team through the information to collect for each journey, so you file all three yourself from one account. Pay per declaration with no monthly fee.

Importing inventory into a GB warehouse

  • GB CDS import
  • Document processing
  • Bulk preparation

A replenishment shipment is closest to a conventional import: a consignment of many lines, from a known supplier, arriving through a chosen port. Your team prepares and submits it in CDUK, with saved suppliers and cloned entries making every restock faster than the last. Real-time validation catches mismatches in weights, values and codes before they reach HMRC.

  • Importer, supplier details and delivery terms (Incoterms)
  • A goods description per product type that identifies material, function or composition
  • Checked commodity code, country of origin, quantity and commercial value per line
  • Weights, packages and transport references pulled from the packing list and transport document

Our team walks through your goods, port and procedure at onboarding.

Discuss replenishment imports
Illustrative example

Turn catalogue titles into declaration-ready detail.

Build every declaration from clear descriptions, checked commodity codes, origin information, quantities and commercial values. The example below uses invented products to show how your team sees the gaps before filing.

Product data

Check the descriptions before they reach a declaration.

Pull goods lines from a supplier invoice or a structured file, then compare each line against what customs needs. Your team completes any vague titles and decides the code and treatment, with CDUK guiding and validating every step.

Scope at a glance

Which question is this shipment asking?

A short map of the common e-commerce movements, what your team establishes for each and how CDUK supports the filing. Roles can be set to match who prepares and who submits.

MovementWhat to establishWhere Customs Declarations UK fits
Warehouse replenishmentImporter, goods, port, procedure, supplier documentsFile GB CDS import declarations yourself, with document processing and bulk upload
Outbound saleExporter, how the goods travel, evidence of exportFile GB CDS export declarations yourself; we confirm scope for parcel flows
Customer returnLink to the original export, identity of the goods, treatment you decideFile the return declaration yourself, with guided steps and checks
EU low-value parcels and IOSSTax arrangements and the EU low-value declaration datasetTell us your flow and we confirm scope. See the E3 duty guide
Safety and security dataWhether an entry filing is needed for the movementFiled separately on the same account. See EU ICS2 and GB ENS

One account covers every row above.

Getting started

Start with one flow, then extend.

Pick the stock or returns flow that causes the most re-keying today and bring it in-house first. Our UK team supports you through onboarding and training.

  1. Map the movement

    Name the flow, the importer or exporter, the goods and the port. Our team confirms the setup with you at onboarding.

  2. Share your data sources

    Tell us the shop platform, export format and the files you already hold. Bulk CSV/Excel upload works from day one, and API connections to your systems are scoped with us.

  3. Run a real shipment

    Upload supplier documents or a structured file, check the extracted lines and complete and submit the declaration with your team. Real-time validation flags anything missing before it goes to HMRC.

  4. Extend to the next flow

    Reuse the product record for outbound or returns work, and see pricing with volume discounts as you grow. Our team can set up a custom plan once your volumes are steady.

Frequently Asked Questions

Questions from e-commerce teams.

Is Customs Declarations UK a Shopify or marketplace connector?

Not as a ready-made plug-in. You file from CDUK using bulk CSV/Excel upload of structured files, and API connections to your shop platform or ERP are scoped with us. Share your platform and export format and we will map the data connection with you. Every filing is logged in your audit trail.

Does this include IOSS or EU H7 filing?

Tell us how you sell into the EU and we will confirm what your account covers for IOSS (Import One-Stop Shop) and EU low-value (H7) datasets. EU ICS2 safety and security filing is available on the same account.

Can it support warehouse replenishment imports?

Yes. Your team prepares and submits GB CDS import declarations for replenishment directly in CDUK, with AI document processing for supplier paperwork. Our team confirms your goods, port and procedure at onboarding. Reusing supplier and product records makes each restock quicker.

Can we send consumer parcels through it?

Tell us the parcel or low-value dataset your operation uses and we will confirm the scope for your flow. Consolidated stock and export movements are filed on CDUK today. Our couriers and express operators page covers the carrier side.

How do returns work?

Treat a return as its own workflow. Keep the export evidence and the information that identifies the goods together, then decide the treatment, since relief may be available in qualifying circumstances. You file the declaration in CDUK, with our team supporting you.

Can document processing help with supplier invoices?

Yes. Intelligent Document Processing extracts data from commercial invoices, packing lists and transport documents into a draft your team reviews, with no per-document fee. You confirm the draft before submitting.

Explore related solutions

Where e-commerce touches other workflows.

Start With One Stock or Returns Flow

Tell us how your goods move and which files you already hold, and we will show you how your team can file it in-house. Pay as you go with no monthly fee, or choose a subscription with volume discounts. Our UK team will help you register and file your first declaration.

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