Your tax office Ludwigsburg informs: The Kreissparkasse account will no longer be available as a bank account from the end of 2020.

The Kreissparkasse account (DE35 6045 0050 0000 0077 59) will no longer be available as a bank account from the end of 2020.
Taxpayers who use the Kreissparkasse account as a bank account (e.g. via a standing order or for individual transfers) are requested to switch to the account of Deutsche Bundesbank (DE24 6000 0000 0060 4015 00) to avoid return debit fees and late payment surcharges in the event of late payment.
Direct debit authorizations and SEPA direct debits are not affected by this.
Thank you for your understanding and your efforts.