You find the export feature as CSV file for the (German) WISO tax software on the capital gains report within your created tax report. Please follow the instructions on the following page.
WISO offers currently only an import option for short gains. All other amounts like margin PnL etc. have to be added manually according the sum in the capital gains report (e.g. helping report "Anlage KAP+SO") in WISO.
Please check the restrictions of WISO which are described here: KAP+SO, WISO and ELSTER reports