Manual changes in invoice verification

Question

Could u plz explain me the impacts of following scenario?s:
1.        In case user had manually make a changes in quantity and amount during invoice verification( MIRO) what is impact in MAP and FI point of view.
-           What is the SAP best practice for this scenario.
2.        From yesterday on words I had initiated a process of creating CREDIT MEMO, SUBSEQUENT DEBIT and SUBSEQUENT CREDIT for the following scenario?s
A.       In case of returns to vendor through purchase order------ MIGO(Mvt type: 161): User has to create a CREDIT MEMO with reference to  this returns PO
B.       In case of invoice verification had been completed, then vendor had given special discount or credit note for particular purchase order: create a SUBSEQUENT CREDIT MEMO with reference to this particular po.
C.       In case of invoice verification had been completed, then vendor had given debit note for freight charges..etc for particular purchase order: create a SUBSEQUENT DEBIT MEMO with reference to this particular po.
However, I want to know the impact of this transaction?s in my material MAP and entries in FI point of view.

Answer 1

1) mistake in qty and amount in invoice
Here if the price control in material master is V, MAP will be calculated based on the existing stock value and goods receipts value (qty * rate).  If the GRN qty is within the PO quantity, MAP will be definitely effected if the quantity entered is different from invoice
if the material is with price control "S:", it will not effect valuated price of the material
Amount difference in invoice depends on tolerance limits specifiedin config.  If tolerance is allowed, the difference is posted to price different account.  This will not effect MAP
REgarding subsequent debit/credit, u have options of loading the difference amount either on material or on special gl account,  In the 1st case, ur MAP will change.  In the 2nd case MAP will not change
Hope this clarified ur doubts
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