Hi, Susan,
In a situation as you describe, there's a little more work to do.
I'm understanding from you that you've issued a PO and subsequently created a receipt for everything on the PO (for ease, I'm going to stick with a single receipt scenario only).
Subsequently, the vendor invoiced you for a portion of what was received only. You want to be able to invoice that portion then, later on, when you receive the vendor invoice for the rest, invoice for that.
In order to maintain the proper vendor invoice numbers, this is a possible solution, starting with the PO.
(1) You issue a PO for a quantity of 2 of one item.
(2) When you receive the 2 items, you create a Receipt A.
(3) The vendor issues an invoice for only 1 item.
(4) Before you do anything with the invoice:
(a) create a negative Quick Receipt B for the vendor and item you're being invoiced for,
(b) create a Receipt C for the same vendor and item -- this will ensure you're inventory quantity on hand is still correct at the original 2 items received with Receipt A.
(5) Invoice for Receipt A being careful to select the Combined Inv/Adj button on the Header tab and selecting the Quick Receipt B for this invoice also. The amount should be correct for what has been invoiced by the vendor. If not, adjust it as you would normally.
(6) Later on, you receive the vendor invoice for the other item. Invoice for Receipt C. Again, the amount should be correct. If not, adjust it.
A couple more steps but should work for you.
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Regards,
Softrak Tech Support