How do I add custom fields in my payment details? VAT invoice data etc. - Dj-Classifieds/Invoice mannager-JoomlaThat!

How do I add custom fields in my payment details? VAT invoice data etc. - Dj-Classifieds/Invoice mannager-JoomlaThat!

Hello,
I would like to add additional fields needed to create a VAT invoice in the payment details. When we select paid payment options ads then we go to the payment I would like the additional fields to be visible here.

So that I could set the additional fields in the plugin "DJ-CLASSIFIEDS-INVOICE MANAGER" So as to generate VAT invoices.

Does any good person know how to do this?

It's about this place:

  1. https://********.pl/pl/my-account/submitted-classifieds/payment.html?id=155