You receive invoices from various suppliers: carriers, forwarding agents, insurance companies, warehouses, etc. to cover the costs for their and similar services rendered when exporting or importing goods, depending on the parity agreed and nature of transactions.  First you should enter any such invoices in the Goods module in order to liquidate them, enter them in invoices received book, etc.

You can subsequently for sake of overviwes link them to SAD.

When attempting to link a document or its line with the SAD, with which it is already linked, the following error is returned:

Close the window clicking .

Solution:

It is not required to link since the selected line is already linked with the selected SAD.