Every time this issue comes up, I have to figure it out, again; how do you match a landed cost vendor's invoice to the receipt. The trick is to check the "LC" (Landed Cost) check box on the entry line.
Once you do that, you can look up the "Item" and you will see the landed cost items, not your inventory item master file. Select the landed cost item you want to invoice, and then click on the expansion arrow next to the "Matched to Shipment" field label.
Here's an example:
These are the landed costs applied to the receiving transaction: