Hello Steph,

The message isn’t related to the problem you are having.

If the Invoice hasn’t been dayended, the item cost hasn’t been calculated yet. When you view it, you are seeing the estimated cost. If you credit the Invoice before it is dayended, the message is telling you that the cost for the credited items will be a reversal of the cost from the Invoice items. When Dayend is run, the Invoice will be processed before the Credit Note.

For a Credit Note to return items to Inventory, the ‘Return to IC’ option must be selected in the Item details.

There is also a ‘Credit notes to return inventory’ option in the Company Profile, on the Processing Options tab under Detail Options. It sets the default for the ‘Return to IC’ option. If you usually return items to Inventory, it should be selected.