Ebay Datev Accounting Interface

With eBay and AccountOne you save more time in accounting.

Do you want to concentrate more on your sales and spend less time on bookkeeping? Do you want a fully automated interface between eBay and your accounting department? AccountOne is exactly the right solution for you.

Over 9,000,000 online orders and the associated payments pass through our system - every month! You too, like >3,500 other online retailers, trust the most powerful platform.

With AccountOne you can...

  • Connect eBay with your tax advisor
  • Synchronize several eBay accounts with your tax advisor at the same time
  • Have purchase orders automatically converted into perfect accounting data and linked to payments
  • save yourself and your tax advisor a lot of time

Preparatory accounting with eBay has never been so easy...

Connect eBay with just a few clicks

With just a few clicks, you can connect your eBay account to AccountOne. We will take care of the rest for you together with your tax advisor. You can find out how easy the connection is in our helpdesk. We will also provide your tax advisor with comprehensive onboarding support.

Fully automated data retrieval

Our API interface retrieves the data from eBay several times a day and makes it available as accounting data on a monthly basis.

Reconciliation with Payments

The revenue transactions are automatically assigned to the payments (provided the payment system is also connected to AccountOne). The fee items and payouts are also posted fully automatically.

100% DATEV compatible export

Our exports are fully batch processable. This means that no import profiles have to be created in the accounting department, but can be imported directly using the DATEV board tools.

Minimally invasive integration

AccountOne integrates into the existing API and tech stack without interfering with other systems.


Directly accessible via web browser without installation. 24/7 Up-to-Date!

Contemporary man browsing in touchpad

eBay order and payment data are retrieved fully automatically via API. The connection to eBay is set up in no time at all. Click on "Log in to eBay" in AccountOne and follow the instructions. Click here for detailed instructions: Ebayexport guide

Each eBay order is independently assessed in detail for VAT purposes. In this way, we ensure that the revenue postings arrive correctly in the accounting department. We transfer the revenue using the individual booking procedure. This means that each order also receives its own booking in the accounting department.

In addition, AccountOne reads out payments and charges and also creates postings for accounting from them. In addition, a payment movement is assigned to each individual revenue entry in accounting.

eBay orders are booked using the individual booking procedure - so each order receives at least one booking line. In the event that there are different tax situations, the posting can be split in order to display mixed tax rates.

The eBay payments are treated as a fictitious bank account in accounting. This is the only way that the 100%ig tax consultancy can be sure that all transactions have been posted without exception.

AccountOne provides a DATEV-compatible CSV record for the eBay orders and payments every month. This is regularly checked with the DATEV checking tools and guarantees a smooth import to DATEV. In addition, our export to DATEV is batch processable.

You therefore do not have to create an ASCII import, but can use the DATEV board tools to read in the data. This prevents errors during import.

eBay DATEV Interface - Features




All marketplaces

ebay.de, ebay.co.uk, Motors and many more.


Connect multiple eBay accounts to one AccountOne account

Multichannel capable

Works hand in hand with all systems, even if data is duplicated

Delivery threshold monitoring

B2B and B2C sales

Including verification of customer VAT IDs

Single booking

GoBD-compliant single posting procedure with automatic OP clearing

OSS reporting data

OSS reporting data included

Loved by tax consultant!

Find out here why tax consultants love us.

Other interfaces

What our customers say:

"fynax offers tax consulting with a customized one-stop-shop service for e-commerce and digital businesses. As with all electronically structured companies, the tax-relevant data in online commerce is also available in corresponding digital form. The collection, processing and evaluation of such data often pose great challenges to entrepreneurs and to us as tax consultants, as the technical complexity requires special knowledge and experience. This knowledge and experience unites us with AccountOne. We share a very close and trusting cooperation and the desire to automate the accounting process for online merchants as far as possible and to make it efficient and secure. AccountOne supports us as a selected cooperation partner in all questions concerning the processing of mass data, interfaces and various store systems and marketplaces."

AccountOne Features

AccountOne means being able to map all sales and payment channels on one platform. We developed AccountOne for this purpose in close cooperation with tax firms and online retailers. The result is a high-performance software that can be individually tailored to the needs of both sides. In addition to classic online trading transactions, AccountOne also maps almost all special cases in online trading. We like to face new challenges and master them together with our customers.

Online retailer

AccountOne can be used to service the following types of online merchants:

  • Micro-merchants
  • Small traders
  • Medium traders
  • Large dealers (group)
  • Multichannel retailer
  • Omnichannel retailer
  • Amazon FBA and EFN, PAN-EU
  • Dropshipper
  • SaaS provider
  • App provider
  • Shopify POS

Tax cases

AccountOne can be used to handle the following types of tax cases:


  • Target taxation
  • Actual taxation
  • Small business
  • PAN-EU and EFN
  • OSS & IOSS
  • B2B deliveries
  • (Cross-border) series transactions
  • Amazon Consignment Stock
  • UK deliveries
  • Vouchers
  • Mixed baskets (UST. rate)


AccountOne can be fully customized in the following ways:

  • Account assignment revenues
  • Account assignment debtors
  • Account assignment to expense accounts
  • Account assignment payment accounts
  • Commingling account assignment
  • Account assignment shipments
  • Length of accounts (4-12 digits)
  • Individual booking keys
  • Individual OSS booking keys
  • Contents DATEV Export (additional columns)


Each API import can be customized specifically for the online merchant:


  • Adjustment order date, payment date, delivery date
  • Exclusion of certain orders (e.g. Amazon connected to Shopify)
  • Import of POS data (Shopify POS)
  • B2B UST ID Import
  • Multichannel retailer
  • Omnichannel retailer
  • Import of invoice numbers (e.g. WooCommerce)

Additional functions

AccountOne offers a wide range of additional features:

  • Pro forma invoices
  • Qualified verification of UST-ID numbers
  • Measurement article performance Amazon
  • Amazon inventory valuation
  • Delivery threshold monitoring (Until 06/2021)
  • Power threshold monitoring OSS 
  • Exports VAT Compliance


AccountOne can provide the following exports:

  • Accounting
    • DATEV-compliant exports (EXTF) 
    • Batch processable exports
    • Special exports for BMD
    • Special exports for ED-Rewe
    • Special exports for SAP
  • VAT Compliance
    • Special exports for AccountVAT
    • Special exports for AmaVAT
    • Special exports for dutypay

Customer testimonials

14 days free & full trial

Includes 3 backdated monthly exports, full access to the software and access to all support resources (helpdesk, email & phone).