И еще маленький вопрос.
А для чего этот индикатор вообще предназначен, на что он влияет? Или где можно почитать подскажите?

Инд. последнего счета-фактуры
Indicates that the last invoice from a vendor has been received for an item and/or that no further invoice is expected.

Use
The final invoice indicator serves as information for the applications

Cash Management and Forecast
Cash Budget Management
Funds Management
If you set the final invoice indicator, purchase order commitments are reset.

However, the final invoice indicator does not prevent further invoices from being posted. Furthermore, it does not replace GR/IR account maintenance in the event of a variance between GR quantity and invoice quantity.

Examples
Purchase order: 100 pieces of material A at $10/piece
-> The PO commitment is automatically set to $1000.
Goods receipt: 80 pieces
Invoice for 60 pieces = $600
-> The purchase order commitment is automatically set to $400.
Invoice for 15 pieces = $150 - final invoice indicator set.
-> The purchase order commitment is automatically set to zero.
Since the final invoice indicator does not have any effect on the GR/IR clearing account, you must clear the difference of 5 pieces ($50) on the GR/IR clearing account if no further invoices are posted.

И как сделать так, чтобы галочка на нем стояла по умолчанию?