To split the payment document value as per the line items of the P O

Question

To split the payment document value as per the line items of the purchase order in the period of payment, so that the payment  amounts are measured against the Capex order assigned as account assignment in the purchase order.(Account assignment tab for the individual line item in the PO.
Example:
Inputs:
Purchase Order 3100012345, line item 10 value 6000 line item 20 value 4000
VAT @10% , account assignment for PO line item 10(Internal Order no 10001) & line item 20  Internal  Order 10002) G/ R no 5105105101 for Rs10,000.
The I/R doc 501501501 appears as follows: (MIRO)
Line 10: Value       Rs   6,000
        20: Value      Rs   4,000
VAT                         Rs      600
                       Rs      400
Total                       Rs11, 000
Withholding Tax Rs 1,100
The accounting entry for MIRO happens as follows: doc 2102102101
GR/IR Dr      Rs 10,000
VAT      Dr     Rs   1.000
Vendor    Cr           Rs9, 900
TDS due   Cr          Rs1, 100
The business expects the payment report as follows:payment  doc 2001200101
PO     Line item       Internal Order MIRO         Invoice                       Payment       Payment period  Amount
                                                                                A/c doc number        doc number          
3400012345     10     10001           5605605601  2102102101           2001200101       001/2009           5940
3400012345     20     10002     5605605601     2102102101           2001200101        001/2009          3960
Currently we are able to show the amounts as Rs 6000 for line item 10 & Rs 4000 for line item 20.
The problems faced.
1.     The VAT line items are auto created, hence the reference of purchase order number and line item are not available. So the VAT portion which is part of payment liability does not get reflected against the PO.(not able to show the VAT portion , when we try to show the payment amount per PO line item.)
2.     The withholding tax is also a problem; WHT is not calculated and assigned per line item. It is calculated on the total amount of basic and VAT. Because of these reasons, the payment could not be shown properly according to the line item of the purchase order.
3.     When part payment is made, against invoices, there is no provision to assign a payment amount against a particular line item. Further, when final payment is made in different period, the clearing document will get generated. That adds to the complexity of differentiating full payments and part payments final clearing.
4.     When residual payment is made, a new line item is created. Here assignment of Purchase order line item against payment for residual items become a problem.
5.     Many a times advance payments are made. Later the invoice is created and balance payment is made. In those situations, the clearing document creates one more line item and makes payment for the balance item. This adds complexity in bringing balance payment alone and to split as per the purchase order line item. The clearing document number system is multi dimensional. It creates two line items for the same item (one at the time of advance and another the time of clearing.)
6.     When full payment is made, the payment document number and clearing document numbers are same. In cases of subsequent or partial or residual payment, the document numbers are different. Because of this, the part payment amounts are shown in the period, where the final payment and clearing are made.
Please suggest a way to split the payment amount in the exact posting period with all the considerations given above.
Regards
Sundararajan
Edited by: Sundarajan Venkatachari on Sep 30, 2009 11:04 AM

Answer 1

Hi,
See Note 301077 - User exits for the interface to accounting, although I think that there isn't this kind of option. Note 429117 - Collective note advice note SD-FI interface will be useful too.
I think that SAP Note 1085921 - Document split perhaps will help you
Regards
Eduardo