Once you have set up the service, you will immediately know what data the tax office has about you. Note: Data can only be retrieved for the last 4 tax years, i.e. in the year 2026 you can retrieve data for 2025, 2024, 2023 and 2022.
If you have activated data retrieval in SteuerGo, you can immediately use the online submission for your tax return. The master data of the tax account holder (e.g. name, address, date of birth, tax identification number) stored by the tax authorities is checked against the information in the tax return for identification purposes. Activation of data retrieval with the tax authorities is a one-time process and takes up to 2 weeks.
This gives you more time for additions that can really save taxes, such as expenses for craftsmen's services, work-related expenses or special expenses.