A seamless VAT compliance
solution for your clients

Marosa supports tax advisors with the operational side of VAT compliance for international e-commerce businesses — including registrations, filings and reporting.
We complement your services by
Working collaboratively with tax advisors
Providing reliable VAT compliance expertise
Supporting complex cross-border e-commerce operations

A trusted partner for tax advisors

Marosa manages the operational VAT compliance work including registrations, filings and reporting. You remain the primary advisor to your client, while we support the compliance execution.

VATIFY PLATFORM

Technology built for e-commerce

Our VATify platform is designed for marketplace and multi-channel sellers.

  • Direct integrations with Amazon and Zalando
  • Simple VATify importer tools for native reports from eBay, Shopify, PlentyOne, Kaufland, JTL and Billbee

This allows us to provide:

  • Automated transaction imports
  • Efficient VAT return preparation
  • Structured data exports for accounting reconciliation
Two people in conversation

Accounting compatibility

Export VAT data; use it in DATEV

Marosa provides VAT-relevant transactional data, classifications and reporting outputs that can be integrated into DATEV workflows. These reports, while not DATEV-native, will allow you to produce all relevant accounting entries, as they include all VAT-related activity abroad.

This allows you to:

  • Import VAT-relevant data into DATEV
  • Apply automated posting rules
  • Reconcile VAT calculations with accounting records

Marosa focuses specifically on VAT compliance and VAT reporting, while accounting systems or tax advisors maintain the full bookkeeping structure.

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Looking ahead

Built for the future of VAT compliance

With upcoming regulatory developments in mind, especially the ViDA reform from 2028, Marosa is already expanding its platform specifically for e-invoicing and real-time reporting.

At the same time, Marosa's broad client base, ranging from international e-commerce merchants to multinational companies, means the company is more diversified than many specialized providers. This ensures the solution remains stable and relevant for your clients under future regulatory frameworks.

VIDA 2028 e-Invoicing Real-time reporting
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Trusted by international e-commerce businesses
Supporting more than 2000 companies globally
Managing global VAT compliance and e-Invoicing
Integrations with leading marketplaces (Amazon, Zalando) and accounting software systems

FAQs

How does Marosa make VAT compliance easier for clients?
How do you submit returns in-house? 

We are registered tax filers in each country, so we are authorized to submit VAT returns for your clients. Our centre of excellence submits 40,000 returns every year with a blend of knowledge and technology. 

Can I review the returns of my clients?
Yes, when uploading your clients to VATify, we can indicate your name and email as the person responsible to review, comment or amend data upload or VAT return approvals. 
How does Marosa support DATEV workflows?

Marosa provides: VAT-relevant transactional tax data, classifications, and reporting outputs.

 

The accounting provider provides: the financial postings, general ledger structure, and bookkeeping records.

 

DATEV requires: both components to create complete and compliant accounting entries.


What this means for the client:

✔ Our data can be imported into DATEV for VAT purposes
✔ It can support automated posting rules and VAT reconciliation
✔ It can be combined with accounting data to enable a complete DATEV import

 

However:

❌ We do not generate the full bookkeeping dataset required for a complete DATEV accounting export
❌ We do not replace an accounting or ERP system

We provide DATEV-relevant and DATEV-compatible data; however, a complete DATEV export also requires the corresponding accounting data.

Will you inform me of relevant changes in VAT compliance?

We’ll keep you up to date on important VAT changes and guide you on relevant regulatory changes impacting your clients' businesses. 

Can I automate accounting extract generation and processing?

Yes. Our VAT compliance software, VATify, has a built-in integration with the APIs of both Amazon and Zalando, enabling automatic data extraction and processing into harmonised tax statements.

 

Those who are also selling through other platforms or their own website can send the data over to our team for manual, expert processing.

Why do you sometimes require notarised documents?

We typically need a small set of standard documents to take over VAT filings in each country, such as:

  • Signed Power of Attorney (PoA) 

  • Copy of the legal representative’s ID or passport

  • A recent trade register extract (usually issued within the last 1–2 months) 

In most countries, scanned copies of wet-ink signed documents are sufficient. However, some tax authorities also require original documents sent by post so they can complete the change-of-agent process and allow us to file on your clients' behalf.

 

Please refer to our Signing Instructions page for the latest, country-specific checklist of required documents and formats. 

Do you offer support with OSS and pro forma invoices? 
Yes. If you need pro forma invoices to support intra-EU movements of goods (own stock transfer), we can provide this service. For that, we only need a product report (ASIN, HS codes, etc.). 

We can also fully manage the preparation and filing of all OSS returns. The relevant data may be provided to us either automatically or manually, depending on the specific case, and we will handle it all from there.
Do you cover all Europe?
Yes! Marosa is a global firm. We file VAT returns in all EU 27, UK, Switzerland and Norway with our inhouse team. We cover APAC, Africa and LATAM with our local partners. VATify reflects this global scope. 
Do you have any integrations?
Yes. VATify is integrated with Amazon and Zalando, meaning that all foreign (non-German) VAT returns can be fully automated.
How long will the setup take?

We will ensure that your clients’ onboarding is fast and efficient.

Partner programme

Commercial offerings

Many tax advisors choose to partner with Marosa to support their clients with cross-border VAT compliance.

We offer the possibility to provide partner-specific commercial conditions for your clients.