To create a credit note:

1. Open the original invoice you want to credit
2. Click "Create credit note / correction" on the detail page
3. MyCompanyDesk creates a complete, finalized credit note in one step: every line from the original is negated and the credit note gets the next number in your sequence
4. Send the credit note to the customer

You cannot adjust the amounts during creation; sent documents are locked, so the credit note always mirrors the original exactly. For a partial correction, create the full credit note first and then issue a new invoice for the correct amount.

Tip: Because you create the credit note from the original invoice, the two documents match exactly and your records stay consistent.