Helping you to help yourself!

Here you will find practical DATEV tools including templates to assist with our collaboration.

DATEV Customer Remote Support Service

Our DATEV client remote support service supports the online collaboration between us as your consultant and you as the customer.

This remote support software enables a direct connection to be established between 2 PCS via any internet access point. Our customer remote support offers remote access, i.e. the remote PC can be viewed and controlled. It also features a presentation mode through which the customer's screen can be presented to the counterpart via the internet. Furthermore, data can be exchanged during an active session and connection. Customer remote support is not installed on your PC but can be downloaded from our downloads area.

When you are invited to a remote support session or if you want to follow a presentation of your counterpart you select the customer module. This means that your PC will be controlled remotely.

Download the customer module directly from the DATEV website. Here you will also find more information on system requirements and their application.

Download for Windows Download for MacOS

DATEV Upload and SmartLogin App

Simply photograph receipts and upload them directly and securely to the electronic receipt archive. The DATEV Upload app allows this even when on the move.

Paper documents to be audit-proof archived in the DATEV data center are usually digitized by scanners. With DATEV Upload mobile this can also be done via a smartphone. The user can thus easily capture the document at source. This is particularly practical for documents for very small cash sums. Receipts for car parking, the receipt for cleaning materials bought in the supermarket, petrol or postage receipts are immediately available via this new method.

DATEV Mobile Upload

The DATEV Mobile Upload app allows you to photograph documents with your Smartphone and upload them along with other digital documents to DATEV Unternehmen Online.

To use DATEV Mobile Upload you need:

  • A Smartphone with a camera (iOS or Android)
  • DATEV SmartLogin for secure authentication

Apple App Store       Google Play Store

DATEV SmartLogin

DATEV SmartLogin is the key to your secure data in the DATEV Unternehmen Online world.

When you register with the online portal, scan your QR code with your SmartLogin app and you are registered!

DATEV SmartLogin as an authentication medium is free of charge for all DATEV users. Further information can be found here.

Apple App Store       Google Play Store


In these unusual times in which maintaining physical distance over a long period is more common, digital collaboration between consultancy and client offers several advantages.

DATEV My Tax supports your digital documenting process by facilitating the digital exchange of documents via a secure transmission path, independent of location or time.

During the registration process for DATEV My Tax you can order your DATEV SmartLogin and apply your indemnification online. In this way you can indemnify your tax return digitally, without having to be present in the consultancy.

Benefit from the advantages:

Transparency: Client and consultancy have access to the same database in DATEV My Tax. A list of recommended documentation supports the client in the preparation of the relevant data.

Security: Documents, receipts and information are exchanged via the certified DATEV cloud which is protected against unauthorised access.

Flexibility: You have access to all stored digital documentation and information around the clock. This enables you to define the scope and type of collaboration individually throughout the year.

Interested in using the digital receipt exchange? Contact us!

Subsidy Advice

Numerous subsidies are available from the federal government, the state, banks and the EU but where to start? Our subsidy consulting areas include: investment subsidies (for machines, storage halls etc.) research and development (i.e. prototype manufacturing and series production) and for services (i.e. online marketing, website creation, web shops, digitalisation, process advice, IT security etc.)

Subsidy advice for companies and how to apply for them is particularly relevant for those companies wishing to invest in their own development. Through subsidies, entrepreneurs can make their investment more appealing and more secure. Nuviu, our competent subsidy partner, is here to support us and you in finding the right subsidy.

Let us know which projects you have in the pipeline and we will verify whether, and above all how your company can be supported.

Nuviu Enquiry

Important Documentation and Forms

We will support you in meeting the high formal requirements of financial administration. Use the templates here. If you notice that something is missing, call us!

Financial Accounting

Property Tax


Call us!
+49 6108/9019-0

We look forward to meeting you!

Adresse bei Google Maps anzeigen

Zahn & Zahn
Steuerberatungsgesellschaft mbH & Co. KG
Bahnhofstraße 2
63165 Mühlheim am Main

Telephone +49 6108/9019-0
Fax +49 6108/9019-29

Monday to Thursday:
08:00 – 17:00 Uhr

Visit us on Facebook or Instagram.

Would you like to send us a message? Click here

Jetzt Kontakt aufnehmen!

Kanal wählen:

Facebook Messenger Instagram E-Mail