The Sales Invoice Line has no direct link to the Item Ledger Entry.
The Item Ledger Entry will be created if you "ship" the item. So you have a direkt link between the Sales Shipment Line and the Item Ledger Entry over field "Item Shpt. Entry No." in the Sales Shipment Line.
To get all the entries for a sales invoice line, u must link to the value Entry. If you use NAV <=4 u must do this with the Document no.
Since 5 u can also use the "Document Line No." in the Table Value Entry.
Comments
The Item Ledger Entry will be created if you "ship" the item. So you have a direkt link between the Sales Shipment Line and the Item Ledger Entry over field "Item Shpt. Entry No." in the Sales Shipment Line.
To get all the entries for a sales invoice line, u must link to the value Entry. If you use NAV <=4 u must do this with the Document no.
Since 5 u can also use the "Document Line No." in the Table Value Entry.
Regards