If you want to cancel an invoice that has been paid via a SEPA run, select the menu item "POS" and the index tab "SEPA". Continue clicking on the three black dots and choose "Create return debit".
Enter the booking number and click on "check". You can now see the direct debit clearly. Then click on "continue".
In the next step you can determine the details of the return debit. E. g. if the account was not covered, you can ask for a fee. It is important to select "open" for the payment method, so that the bill can afterwards be canceled. You also have to select a reason. Confirm your settings by clicking on "Create Return debit".
You can now cancel the bill as usual!
Important! If you have collected the amount, you have to return it manually.