The date until which you want LN to process the sales schedule data. LN processes all sales schedule lines of which the invoice date is earlier than the date as entered in this field.
You can use this field to only process sales schedule lines that are invoiced before a specific date. For more recent lines, you can decide not to process them because you want to have the time to perform shipment corrections, if necessary, in the Sales Schedule Invoice Lines (tdsls3140m200) session.
You can print invoiced sales schedule line history in the Print Sales Order/Schedule Line History by Sold-to BP and Item (tdsls5401m000) session.