OSS Self-Service

Submit One-Stop-Shop filings in 2 minutes

countX calculates your taxes for the OSS submission. Simply download the export and submit it directly in the BOP portal.

Fully automated validation of all OSS relevant data
Uploadable file for BOP incl. instructions for action
File for reconciliation for the tax advisor with all transactions
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What you get
Full automation
Create direct APIs to all relevant marketplaces and ERP systems. Our program handles the ongoing calculation.
Intuitive customer portal
Manage your OSS reporting conveniently in our countX customer portal. Your tax advisor also gets access and valuable information.
OSS upload file
We provide you with an uploadable csv file containing all OSS transactions.
Managing Director countX
With our OSS self-service, you receive fully prepared files for your OSS submissions with minimal costs
How it works
Create an account
First create an account to the Client Portal where you get access to your files
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Connect data source
with a few clicks. So we can get data automatically.
Download files
Download the prepared files on the Client Portal in the beginning of the reporting month.
Upload file to BOP
Just submit the prepared files to BOP portal according to the provided instruction.
100% protected data
All data is evaluated anonymously
Only relevant data is processed
No access to your Seller account

Clients say


“When it comes to international VAT companies don’t have it easy. We found a trusted partner in countX, who keeps an eye on changes in VAT law and proactively implements all changes.”

Sebastian Blabla
Geschäftsführer VitaminVersand24

“We have been working with the team behind countX for many years. They have always solved our problems, offered competent personal support and automatised a lot of their processes. A strong partner!”

Christopher Glatzel
Vivere GmbH

“We have been working with the VAT team of countX for many years and are very happy. The Amazon FBA PAN EU program in combination with OSS has been solved for us and is running effortlessly since July 2021.”

Julien Steinweg
Charlie und Finn UG
Start preparing your OSS filing painlessly in 2 minutes.
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