Hi,

In Odoo, you can easily change draft documents like invoices. However, once an invoice is finalized or "posted," you can't directly edit its amount because financial records need to be stable. Instead, you make adjustments by creating a Credit Note (which acts like a negative invoice) or a separate manual journal entry. These new documents then create their own entries in your accounting ledgers, like the General Ledger and Partner Ledger, showing the original transaction and the adjustment. Every change, including who made it and when, is recorded in the Chatter (an activity log on each document), providing a clear history for auditing.