With the requirement for electronic invoices (E-Rechnung) in Germany it would be good to be able to edit existing customers to add meta data that are not on the invoice itself, but can be used in the XRechnung or ZUGFeRD version of the invoice.
Also all data that are additionally entered for the e-invoice data should be saved with the individual invoice.
Currently no data is saved and the data is taken only from the text fields dynamically. That generates a mismatch between an actual invoice sent to the customer (with all field e-invoice fields filled out) and the invoice data if later opened again in SubTotal.
SubTotal version: 1.6.3
Operating system: MacOS Sonoma 14.7.4
Device model: Mac Studio
