If you want to be able to enter a posting date that is different from the invoice date on your customer and supplier invoices, you need to activate the functionality under Settings - Company Settings - Activate functionality, see below:
When the functionality is activated your supplier invoices and customer invoices will have both dates as defined below:
- The Invoice date refers to the actual date the invoice was raised by the seller. This date is also used by the payment term to calculate the due date of the invoice.
- The posting date is the date (the period and year) at which you take the invoice into account in your accounting. It is usually the date at which you receive the invoice.
The Extra date field will be visible in the subledger reports and in the invoice lists.
This is useful in cases where you, for example, receive travel expenses at a certain date, but they actually belong to an earlier period on which they should be posted.