OSS Transaction DocumentationCurrent: 2026

OSS VAT records – what data must be kept for 10 years?

Publication: 22/08/2026Updated: 22/08/2026Reading time: 19 min

The OSS records are intended to enable the reconstruction of each transaction: from the location of the goods and the country of consumption to payment and subsequent correction.

You keep the data for 10 years from the end of the year of the transaction and make it available electronically upon request of the relevant administration.

Transaction Data Model

Each record must connect seven areas

A sales report alone isn't enough. The records should include transaction qualification, logistics, tax, financial, and a complete history of changes.

No
Central RecordUnique OSS Transaction Identifier
Correction link
01

Customer and location

State of consumption and evidence of customer location.

02

Goods or services

Type of service, items, quantities and identifiers.

03

Logistics

Place of commencement and termination of transport and warehouse.

04

Tax

VAT basis, currency, rate and amount.

05

Payment

Date, ID, advances and amounts actually received.

06

Trading platform

Channel ID and determination of who settles VAT.

07

Corrections

Cancellation, refund, discount and correction document.

The adjustment does not replace the original sale

Store the original transaction ID so you can go back and forth between the sale and the change.

The scope of records stems, among other things, from Article 63c of the Implementing Regulation. The Commission describes it in the material on records and controls in the OSS.

Scope of records

What information should the OSS records contain?

The data source may vary, but each item should have an owner, validation, and a set retention end date.

Field, Source, Control and Application
FieldSourceValidationRetentionA common mistakeNeeded for
The State of ConsumptionShop and VAT rulesLocation evidence10 yearsCountry selected manuallyVIU-DO
Type of product or serviceProduct catalogItem code and description10 yearsToo general a descriptionRate
Date of delivery or serviceOrder and logisticsTax event10 yearsOrder date instead of delivery datePeriod
Tax baseSales systemTotal items and discounts10 yearsNo discountVIU-DO
Transaction currencyOrderCurrency code10 yearsCurrency without exchange rateConversion
VAT rateTax engineProduct and state10 yearsCurrent instead of historicalControl
VAT amount and currencySales systemBase × rate10 yearsRounding differencesVIU-DO
Payment and datePayment operatorPayment ID10 yearsNo connection with the orderControl
AdvancePayments and accountingDate of receipt10 yearsSkipped prepaymentPeriod
InvoiceInvoicing systemNumber and date10 yearsInvoice without OSS recordEvidence
Refund, discount or correctionReturns handlingoriginal sale ID10 yearsSales OverrideAdjustment
Location evidenceShop, bank, chainConsistency of evidence10 yearsOnly the country from the formVAT place
Beginning and end of transportCarrier and warehouseActual route10 yearsHeadquarters instead of a warehouseWSTO
VAT number and warehouseWarehouse systemShipping location10 yearsNo stock country numberLocal VAT
Platform and VAT settlementPlatform ReportThe Role of a Recognized Supplier10 yearsDouble demonstrationControl
Location evidence

One country entered by the customer may not be enough

For services, especially telecommunications, broadcasting and electronic services, the type and amount of evidence depend on the specific rule.

Commercial proof

Data provided upon sale

  • billing address;
  • permanent residence address;
  • other commercial information.
Technical or payment proof

Independent confirmation

  • IP address;
  • bank details;
  • SIM card country code.
Practical example

One order DE → FR and return after eight months

With WSTO, the actual shipping and delivery location is what counts. Sales must be linked to the German warehouse, the French customer, and subsequent adjustments.

Order ID
ORD-0842
Product
SKU-114
Warehouse
DE-BER-02
Delivery date
15.03.2026
VAT rate
France
Sales currency
GBP
OSS Currency
EUR
Payment
PAY-98471
The primitive period
Q1 2026
Payback after eight months

The adjustment retains the original country, rate, exchange rate, and billing period.

RELATED: ORD-0842
Change history

Correction requires the original version of the transaction

For a one-year return, you still need the data used at the time of sale. Don't recalculate the old record with the new rate and replace the original sale with it.

Original version

Sales from 2026.

Country
France
Rate
Historical
Course
From the sales period
Quarter
Q1 2026
Correction record

Refund or discount

Link
Sales ID
Cause
Refund or discount
Sum
Value of change
History
No overwriting
Audit principle

From each correction, go to the initial sale, and from the initial sale to all subsequent changes. Details of the settlement are described in the VAT OSS correction.

Retention axis

You count ten years from the end of the year of the transaction

Deregistration from OSS does not end the obligation to retain data.

  1. 1
    15.03.2026

    Sales covered by OSS.

  2. 2
    31.12.2026

    The end of the year from which you count your period.

  3. 10
    Years 2027–2036

    The records remain complete and available electronically.

  4. After December 31, 2036

    Earliest retention end for this transaction.

The data deletion policy should also be consistent with other legal obligations. The Commission confirms that the 10-year period remains in effect even after the OSS procedure is terminated.

Electronic accessibility

The screenshot of the store is not a complete record

It is safest to maintain a machine export with field descriptions, a code dictionary, and completeness checks.

CSV

Simple transactional export

Works well with large numbers of records and automatic total checks.

  • one record or unambiguous items;
  • fixed column names;
  • compatible date and currency formats.
XLSX

File with description and control

It may contain a field dictionary, a checksum spreadsheet, and a description of the export rules.

  • description of codes and sources;
  • totals by country and rate;
  • clear linking of corrections.
Field descriptionCode dictionaryChecksumsExport version
Control and sharing

The country of consumption may request detailed data

The records should be ready for electronic transfer via the country of identification.

1

Data request

The administration indicates the scope, period and deadline for submitting the records.

2

Export and reconciliation

The file must combine transaction records with declarations and corrections.

3

Sales recovery

Each amount should have a source, proof and a clear history of changes.

Lack of complete records increases the risk of sanctions

Persistent breach of obligations may result in exclusion from VAT OSS. The full procedure is described in the VAT OSS inspection and penalties.

Monthly checklist

Check the data before closing the period

Regular checking reduces the number of manual clarifications before preparing the VIU-DO.

Completeness

  • all sales channels;
  • duplicate orders;
  • distinction between B2B and B2C;
  • evidence of location;
  • place of shipment.

Tax and money

  • VAT rates;
  • currencies and conversions;
  • payments received;
  • sales through platforms;
  • totals by country.

History and security

  • returns and discounts;
  • original sale ID;
  • VIU-DO compliance;
  • export copy and permissions;
  • retention end date.
Last check

Keep a copy of the export, confirm the backup, and verify that the record totals match the data being submitted for billing.

Historical VAT rate

Record the rate, not just the tax amount

Upon subsequent return or inspection, you must recreate the rate appropriate for the product, country and time of sale.

Check EU VAT Rates 2026

The general scope of the procedure is explained in the VAT OSS.

Adrian Andrzejewski, president Taxenlight
Adrian Andrzejewski,President Taxenlight
Tax support

Can't reconcile your store, payment and warehouse details?

We help organize OSS records, separate local transactions, and prepare data for declarations and audits.

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Basics

Registration and settlement

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Advanced topics

Registration and settlement

OSS VAT records

The scope of data needed to prepare declarations and subsequent control of OSS settlements.

Read the guide

Do you need data consistent with the OSS VAT declaration?

Prepare a consistent transactional export before quarter closing and sending VIU-DO.

Frequently asked questions

OSS VAT Records - Questions and Answers

Katarzyna Andrzejewska
Author of the article

Katarzyna Andrzejewska

VAT Abroad Specialist

She has been involved in VAT compliance and other foreign taxes for nine years. Working directly with clients daily, she understands foreign tax procedures inside and out. She stays abreast of changes in tax regulations and quickly translates them into specific, useful, and understandable blog content. Combining her substantive knowledge with tax experience allows her to create content that truly supports entrepreneurs in their development in foreign markets.

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