Edit a sales invoice

Goal

Correct a sales invoice while it is still editable.

Sales clerk (sales.manage).

Draft invoices are editable.
Posted invoices are normally immutable. Changing posted data requires elevated document-edit policy (super-admin style snapshot) — day-to-day corrections use a credit note, not silent edits.

Open the invoice from Sales invoices.
If status is draft, choose Edit, fix header/lines, and save.
If status is posted, do not expect free edits — create a credit note or use the invoice Credit note action for a full reverse.

Draft changes are saved, or you are on the correct correction path for posted invoices.