So have you created your own report transformation?
What country is this for?
Have you looked at the localisation for other European countries such a Nederland and United Kingdom (past tax scheme)
Tax on 0% tax code I assume is a calculated value as it is not actually paid to anyone? I don’t think that’s possible with the current implementation.
Edit
I assume you are adding reverse change tax code for a localisation for Ireland Report Transformation for Reverse Charge