Hello
But there is no a credit invoice.
Yes it is correct.
At the moment there is no credit invoice.
But we are at the moment implementing it.
Because VM is not an accounting system it does not naturally handle such things.
Those are 2 different things.
An accounting system is a program that ensures the maintenance of accounting: ie retranscribes all the transactions made by the company with its partners (customers, suppliers, employees, partners, bank).
VM is not an accounting system, but a software that can deliver invoices.
An invoice is an accounting document that proves a purchase or sale which will be used by the accounting program.
As such VM must comply to some rules, which imho are common to all countries in the world. One of the important rules is 'not allowed to delete invoice', but there are others.
When VM does not edit credit invoices, then you have to do it 'manually' or via an ERP.