National VAT
International VAT
Customs and
excise duties
Tax audits and
tax disputes
TAX Compliance and process consulting


The VATgroup team advises companies of any size as well as non-profit-organizations and public-sector institutions concerning all matters of national and international VAT law and in the area of customs and excise duties. We support our clients both project-related as well as regarding current activities. Furthermore, we act as “consultants for consultants” for a various number of colleagues in Germany as well as abroad.  

With our strong network of international tax firms and IT consultants, we can offer a special added value to our clients. This allows a comprehensive consulting regarding cross-border and international issues. Moreover, we can support you with the depiction of sales tax processes, customs and excise duties in your ERP system. In cooperation with our clients, we find practical and legally compliant solutions and provide support with their implementation.  

Robert Hammerl and Andreas Fietz of VATgroup can rely on their many years of experience from their activities in fiscal authorities, as consultants at renowned tax and corporate law firms and as speakers and experts at several associations and publishing houses. Profit from the many years of experience of Robert Hammerl, Andreas Fietz and the team of VATgroup in the following fields of activity: 

National VAT


During our project-based and ongoing sales tax advice, we can rely on many years of experience of our partners and staff from their activities at fiscal authorities, as consultants at renowned law firms, tax consultants and corporate law firms and as speakers and experts at renowned publishing houses. You profit from our experience when trying to find practical solutions for sales tax issues.

Furthermore, we support our clients also in the areas Compliance and Declaration, e.g. by supporting them in completely fulfilling the fiscal duties of disclosure, documentation and retention of records as well as with corresponding with the fiscal authorities. Furthermore, we advise our clients in the fields of customs and excise duties.

Among other things, we offer the following services:

  • Setting up expert opinions regarding all VAT and customs-related questions
  • Examination and drafting of (contractual) business relationships to optimize sales tax consequences
  • Advice relating sales tax during the foundation of companies and company transactions
  • Preparation of advance sales tax returns
  • Preparation of annual VAT return
  • Preparation of summary and Intrastat returns

International VAT


VATgroup has an extensive network of tax consultancy firms abroad which is characterized by close and trusting cooperation for many years now. This allows a comprehensive consulting of our clients regarding cross-border and international issues and a reliable support concerning fulfillment of sales tax reporting requirements abroad.

In cooperation with our network partners abroad, we can offer you help regarding the following topics: 

  • Sales tax registrations abroad
  • Sales tax assessment of your business transactions abroad
  • Fulfillment of sales tax and customs notification obligations abroad
  • Input tax refund procedures
  • Optimization of international delivery and service relationships with a view to customs and sales tax matters

Customs and
excise duties


The VATgroup has important know-how in the area of ​​customs and excise duties and can also provide targeted advice with its network of tax offices abroad.

As a result of globalization and the partly necessary entrepreneurial flexibility, our clients choose to make use of our services in relation with the following topics:

  • Complying with the notification obligations abroad
  • Optimization of international delivery and service relationships with a view to customs matters
  • Customs tariff information as well as import and export VAT issues
  • ATLAS customs declaration
  • Agricultural duties and taxes on agricultural subsidies
  • Review of customs and excise duties
  • German Energy Duty Act (Energiesteuergesetz) - Taxation of all types of energy, both fossil (mineral oils, natural gas, liquid gas and coal) as well as renewable energy products (vegetable oils, biodiesel, bioethanol) and synthetic hydrocarbons from biomass used as heating fuel or motor fuel
  • Electricity tax law – taxation of electricity
  • Tax relief in excise legislation

Tax audits and
tax disputes


Our consultants worked for fiscal authorities and were responsible for external audits and therefore dispose of several years of experience what concerns dealing with fiscal authorities. Through these activities, we have comprehensive experience concerning the processes within the tax authority. You profit from this experience not only in the daily communication with the fiscal authorities but also during external audits, when wanting to gather binding information and during assistance in judicial and extrajudicial proceedings. 

VATgroup can support you especially in the following areas:

  • Assistance and advice during tax authority audits
  • Assistance with special sales tax audits and sales tax reviews
  • Binding information and obligations
  • Binding and non-binding customs tariff information
  • Tax enforcement and tax defence advice
  • Mutual agreement procedures
  • Extrajudicial representation
  • Representation in proceedings before fiscal courts
  • Representation in proceedings before the Federal Fiscal Court 


Tax compliance and
process consulting


VATgroup assists you in complying with any formal prerequisites for appropriate sales tax compliance. Therefore, we analyze existing processes and - if there is potential for improvement- elaborate practical solution possibilities for your company.  

We are your partner regarding the depiction of sales tax processes in your ERP system. For this purpose, we adopt the processes in your company, assess those regarding sales tax issues and translate the results into a matrix which is the basis for tax determination in your ERP system.  

We always advice pro-actively to reach the best result for your company. After many years of work at fiscal authorities, our consultants have the necessary experience and know-how to simulate tax audits in your company. We examine directly within your ERP system and with the test software used by the fiscal authorities.

VATgroup supports in the following areas:

  • Simulation of  special sales tax audits
  • Simulation of tax audits
  • In-house trainings
  • SAP and ERP health checks
  • Drafting and reviewing of compliance processes/internal control system in the area of sales tax
  • Setting up business process models as basis for automatic tax determination in the ERP system
  • Representation of clients in proceedings before the Federal Fiscal Court