Dortmund and Duisburg
taxadvice advises businesses and business owners on complex tax matters — from ongoing compliance to transactions. From our offices in Dortmund and Duisburg, we serve owner-managed companies and their shareholders, clients across Germany and foreign companies with VAT obligations in Germany. Our clients include medium-sized companies with around 600 employees.
We are a partner-led firm: every engagement is led by a responsible tax adviser who knows the structure of the business and is available at every stage.
taxadvice advises medium-sized companies, groups, real estate companies, partnerships and corporations throughout Germany — particularly on complex tax matters, transactions, VAT and the digitalisation of finance and accounting processes.
Areas in which we have worked continuously for years, know the case law and the tax authorities' position, and regularly see transactions and proceedings through to completion.
01Real Estate Tax & Transactions
Structuring of acquisitions and disposals, asset deals and share deals, real estate transfer tax, extended trade tax deduction, reinvestment reserves under Section 6b EStG.
Contact person:
Thomas Retzlaff, +49 231 2886160
Wolfgang Buchholz, +49 231 2886160
02Indirect Tax | VAT
Option to tax under Section 9 UStG, input VAT deduction and adjustment for real estate, reverse charge under Section 13b UStG, cross-border supplies, representation of foreign companies.
Contact person:
Thomas Retzlaff, +49 231 2886160
03Tax Controversy
Voluntary disclosure under Section 371 AO, defence on the tax aspects of criminal investigations, cooperation with specialised criminal defence lawyers.
Contact person:
Thomas Retzlaff, +49 231 2886160
Wolfgang Buchholz, +49 231 2886160
04Tax Technology & Process
Connecting upstream systems to DATEV, e-invoicing, GoBD and process documentation, reorganisation of the month-end close.
Contact person:
Wolfgang Buchholz, +49 231 2886160
05
Financial accounting, payroll including construction industry payroll, annual financial statements, tax returns.
Contact person:
Nicole Oehmen, +49 203 739 86 11
06
Business succession, inheritance and gift tax, restructurings, transactions, tax audits, tax compliance management systems, international matters.
Contact person:
Learn moreThree tax advisers with clearly defined responsibilities. Enquiries go directly to the person handling the matter.
taxadvice was formed through the merger of Nicole Oehmen's firm, founded in Duisburg in 2003, with the Dortmund firm of Wolfgang Buchholz and Thomas Retzlaff. Our new business comes almost exclusively from client referrals — the most reliable measure of the quality of our work.
Partner-led tax advice with a clear profileAn initial consultation usually establishes quickly how we can support you.
Planetenfeldstraße 97
44379 Dortmund
Kaiserswerther Straße 228
47259 Duisburg
