If you want to link your Lexware Office account with your smarta profile, you need the Lexware Office XL version.
Only this version gives you access to the Public API, which is required for the integration.
Step 1: Create an API key in Lexware Office
Log in to your Lexware Office account.
Go to the Public API management via the following link:
Click on the green button „API-Schlüssel erstellen“ (Create API key).
Choose whether you want to create a key with all permissions or with individual permissions.
For connecting with smarta, we recommend the option all permissions.
Enter a name, e.g. “smarta Integration”, and check the box to agree to the terms of use.
Click on "API-Schlüssel erstellen“ (Create API key).
Copy the key immediately and keep it safe. Once you close the window, it cannot be displayed again.
Step 2: Enter the API key in your smarta profile
Log in to the smarta WebApp.
Click on Profile and go to the section Accounting connections.
Select “Connect” to link your Lexware Office account.
You will automatically be redirected to the API key input screen.
Enter the API key you created earlier into the field “Enter API Key here”.
Click on “Connect”.
Your Lexware Office account is now successfully connected. We will automatically import the available documents for all tax years that are not yet closed.
Connection status in your smarta profile
In your profile, under Accounting connections, you will find different status messages that show you the current state of the integration:
No Connection
If no Lexware account is connected yet, you can create one via “+ Connect” – provided you are using the Lexware Office XL version.
Activate Connection
This status is shown when you have started the connection process but have not yet completed it.
Simply click on “Activate Connection” to continue and proceed to the API key input screen.
Active (Connection Successful)
When your Lexware account is successfully connected, you will see the status “Active” (in green) in your profile. In addition, a banner will appear confirming that the connection has been successfully established.
Connection Failed
If the connection could not be established, this will be displayed both in the Accounting connections section and in the banner.
In this case, click on “Contact Support” so we can look into the issue.
Frequently Asked Questions
Which version of Lexware Office do I need?
Which version of Lexware Office do I need?
The integration only works with the Lexware Office XL version.
For which period are my documents synchronized?
For which period are my documents synchronized?
Your documents are automatically synchronized starting from the last tax year that has not yet been closed.
For accounting service clients, synchronization starts with the documents after the last submitted VAT return.
What happens when my API key expires?
What happens when my API key expires?
Lexware API keys are valid for a maximum of 24 months. In the Public API management you can either create a new key or extend the validity period.
Do you need support?
For our clients:
Feel free to reach out to us anytime at kontakt-team@smarta-steuern.de or book a consultation here – we're here for you!
Not a smarta client yet? No problem!
Book an appointment here for our comprehensive startup package or a consultation if you only have questions about specific topics.
Further questions?
Contact us via the app or by email at kontakt-team@smarta-steuern.de if you want to learn more about our consulting services or have other tax-related concerns.