Description
If you have worked in Germany, rent out property there or receive German pension income, you may owe a German tax return alongside your Irish one. WISO Steuer 2026 is the country's most widely known tax program and covers income tax for the 2025 tax year. Irish customers can buy it from TresBizz and get the licence by email.
Please note that the program is in German and designed for German tax and banking rules. It cannot prepare an Irish Form 11 or a PAYE return.
The software asks only what is relevant to your circumstances, explains each term simply and flags entries that look wrong. As you go, you can see which parts are done and which remain, and a closing overview shows what is still missing and the likely outcome.
What you get
- Income tax return for Germany, tax year 2025
- A guided route through every section
- Checks that catch implausible entries
- Advice on where tax can be saved
- Electronic filing via ELSTER
- Reuse of last year's figures
Because earlier data can be imported, you avoid retyping personal details, and the built-in checks make queries from the German tax office less likely.
Progress is saved as you go, so you can stop for the evening and return to the same place later. Help text sits beside each field, and every entry can be corrected afterwards without losing the rest of your return. The layout is clean enough that a first-time filer in Germany can follow it.
Who it is for
Employees, retirees, families and students with a German filing duty. No tax training is needed, though reading German is a must.
Licence details
One user, valid for twelve months. Activation is intended within the European Union, which includes Ireland.
Buying from TresBizz
TresBizz is a European software seller in Brussels, Belgium, and every licence is a genuine new one. In Ireland that means:
- Pay in euro by card, Apple Pay, Google Pay or PayPal
- An official VAT invoice is issued for each order
- Businesses elsewhere in the EU may add their VAT number when ordering
- Key and download link are emailed, normally within minutes and always within a day
- Email support, with a replacement or refund if a key fails
The whole process is online, with nothing posted to you.
What your PC needs
Windows 10 or Windows 11, plus internet access so the licence can be activated. Nothing further is stated in the product information.
Getting started
After payment you receive an email containing the licence key and a link for downloading. Install the program under Windows, type in the key and activate online. From there you enter your details, review the checks and file through ELSTER.
Should activation fail, write to us by email and we will swap the key or return your money.
Common questions about WISO Steuer 2026
Which year can I file for?
The 2025 tax year.
Does it have an English version?
No. The interface is German and the rules are German.
How is the return filed?
Through ELSTER, from within the program.
How soon is the key sent?
By email, typically in minutes and always within 24 hours.
What if my key is faulty?
We replace it or give you a refund after you email us.
















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