Field help: (2022) Does the proof have unlimited validity? This text refers to the Steuererklärung 2022. You can find the version for the Steuererklärung 2025 at: (2025): Does the proof have unlimited validity? Select "Yes" if thedisability card orpension approval notice from the social services officestatement from the care insurance fund (for nursing care level 4 or 5)has unlimited validity.