We have been in contact with neto and told that there are no settings to prevent a Tax Invoice from being altered after it has been created by staff member. This ability to change a Tax Invoice, minutes, hours or months after the creation of a Tax Invoice can be considered fraud and exceptionally bad accounting practice. The only way a Tax Invoice should be able to be 'changed' is through creating a Tax Adjustment note or Credit Note.
This needs to be changed/amended or have a new setting added quickly as this presents legal ramifications and leaves our company and neto vulnerable.