First the receipt is posted - quantity is increased
Second the invoice is posted - Value is increased
Now my question: Is there any way i can reverse (undo) the 2nd step. Just nullify the effect of invoice but not the receipt i. e., I want to reverse the inventory value and the respective GL entries but want to keep the item ledger intact.
You could issue a PCM (Purchace Credit Memo) to reverse your GL entry! On the PCM form click on Function>Copy Documents and pull your PI # then post your PCM. It will reverse your PI (step 2 above) and you can invoice your order again!
To reverse both steps 2 and then 1, you will create Purchase Return Order.