About us

Advinez is an organization in the field of business services founded by Nadja Elferink. Advinez provides administrative and tax services, IT services and outsourcing.

Our motto is:
"Don't offer your relationship just a service, but make sure to provide a complete solution for the problem!"

Nadja Elferink
Director administrative and tax services



Personal goal
Nadja Elferink strives, with the experience gained during the years, to offer high quality accounting and tax services to small and medium enterprises in the Euroregion which will contribute to the success of these companies.



Denis Elferink
Director IT services


Denis Elferink is specialist IT services. Denis has worked in the field of workplace management, server management, application deployment and software packaging for 15 years. Denis provides project-based support in areas such as RES, App-V, MSI, Xendesktop, Microsoft desktops and servers, (on-the-job) Training.

Certifications: MCSA, MCSE, MCITP, CCA, CCP, RES WM, CEH, Comptia CTT+, MCT

Kees Reenders
Tax Consultant

Kees Reenders is Tax Consultant. He has gained more than 10 years of experience and specializes in the formal tax law.

Latest news

Worldwide income return

24 Nov 2016

The 'Worldwide income return' (‘Opgaaf w

Tax on assets changes

24 Nov 2016

Non-resident taxpayers no longer pay tax on all their

Taxes 2017

24 Nov 2016


Some tax regulations change from