Freiwillig abgegebene Steuererklärungen sowie geleistete Steuernachzahlungen seit 2001 (G-SIG: 16041073)

This question asks for data on voluntary tax declarations and tax payments made since 2001. It seeks to understand the trends and volume of these financial activities over time. The information requested could affect taxpayers and tax authorities by providing insights into compliance and revenue collection patterns.