The Crediting of order tab is displayed if the Invoice type has been set to 2 Credit in the Supplier invoice tab, in combination with that the debit invoice (whose Consecutive number has been entered) has a linked purchase order.
Here you enter what should be credited. Check the Credit checkbox to the far left for the invoice row/rows that are to be credited. You can also enter the quantity to be credited. By default this is set to the entire quantity of the invoice row.
Using the Select all button all invoice rows will be marked to be credited.
Next to Amount to credit you will the amount that will be credited both excluding and including VAT.
When you click on the OK button, the amount to credit will be transferred to the Supplier invoice tab and the invoice basis will be moved to the Order link tab which will then be displayed. It is not possible to change anything on the invoice basis in the Order link tab. In order to do that you must first go back to the Crediting of order tab and make your modifications and then click on the OK button again.
If a price should be credited (when a customer for example has invoiced you an incorrect price each) then you first have to credit the entire row quantity using the OK button. Then you have to enter the Invoice amount according to the credit invoice in the Supplier invoice tab. After that you have to add a new row with the correct price each and the same quantity in the Order link tab so that the Diff will become 0 (zero) in that tab.
When the credit invoice for a debit invoice with a linked purchase order is saved, then the purchase statistics for the parts will go back. If it is a subcontract purchase that is being credited, then the cost in the post-calculation on the manufacturing order will also go back.