Field help: (2024) Different last name (if applicable) This text refers to the Steuererklärung 2024. You can find the version for the Steuererklärung 2025 at: (2025): Different last name (if applicable) Enter the last name of the child, if different from the last name of the taxpayer.If you do not enter the last name here, SteuerGo will assume that the taxpayer and the child have the same last name.