Tax percent is changing to 19% when rate is standard and provided percent is 7%

[urakozz]

Hello and thank you for the library.

We are currently exploring its functionality and have identified a bug in the tax calculation.

If in the German invoice example from tests you'd change percent from 19% to 7%, the result of parsing would be still 19%

It seems like "rate": "standard" takes priority over provided percent, however it's inaccurate.

Source: Factur-X Documentation
§7.3.3.3 THE BLOCK "RAM:APPLICABLEHEADERTRADESETTLEMENT"

BG-23: VAT breakdown block...
✓ VAT applicable on a standard or reduced rate: "S"

I suspect this is probably automation on the gobl itself, but it probably would make sense if provided percentage would take a priority over the rate. It feels like it makes sense not only for German/French accounting, but as a generic behaviour