After receiving the purchase order, generate a sub rental invoice to start the invoicing process. Enter the invoice number, description, calculation date, and invoice date.

You can update the match status now or just before posting the invoice.

Standard procedure

1.	Go to Rental order management > Rental orders > All sub rental orders.
2.	In the list, mark the selected row.
3.	In the list, click the link in the selected row.
4.	On the Action Pane, click Invoice.
5.	Click Invoice.
6.	In the Number field, type a value.
	Note: An invoice number is mandatory and must be a unique number
7.	In the Invoice date field, enter a date.
8.	In the Calculation date field, enter a date and time.
9.	Select Yes in the Until calculation point field.
10.	Click Save.