I have a specific question about Swiss QR Bill. When i generate a Swiss QR-Bill I get everything except the reference number.
I don't find any further information about the reference number. Interesting the ISR is filled out and I can see the reference number on the invoice in the register: Other info and then: Payments -> Payment Reference: 000250097798000000202000042

Why is it not printed on the Swiss QR Bill?

Which fields are important for the QR Bill to be filled out when I want to use QR-IBAN?

CHF ISR Subscription Number -> Do I need that for Swiss QR Bill?

What is supposed to print on the field: Additional information?

Thank you for any answers.