How to set up structured payments, f.e. to 'Tax Authorities' in the Netherlands? (We need to put in 'betalingskenmerk'.)

Can somebody maybe help me how to set up structured payments, f.e. to ‘Tax Authorities’ in the Netherlands? (We need to put in ‘betalingskenmerk’.)

I just tried, but didn’t find how to create the correct XML.

Thank you for help.

Ilse van den Boom