How to apply a PO-matched prepayment invoice that has an extra tax line??

Question

I have a situation where I created a prepayment that's matched to a PO, but since the prepayment invoice document has VAT associated to it and not the PO, I need to add that extra line. So after matching the prepayment to the PO, I added an extra line on the prepayment as Item type TAX.
Now after creating the actual invoice, when trying to apply the prepayment on the invoice, I can only see the actual PO amount and not the VAT line that was added afterwards to the prepayment. Therefore the invoice goes on a distribution variance hold.
My question is how would I be able to create a prepayment that's matched to a PO and that has an additional TAX line and then later on apply the full amount to an invoice?
All responses appreciated!

Answer 1

Hello
I still have to investigate for a problem with prepayments and line level calculation also (no PO matching involved), here is what I foundin the main AP doc (115apug.pdf, 4-150 to 4-155)
*Applying Prepayments in the Invoice Workbench*Payables creates Tax distributions automatically either when you choose the Calculate
Tax button in the Distributions window, or when you submit Invoice Validation for the
invoice. For invoices you enter in the Invoice Workbench, you can apply a prepayment
either before or after you validate an invoice, or while you are entering it. If you use Line
level or Tax Code level automatic tax calculation, Payables always creates separate tax
lines for your Item and Prepayment type distributions.
Note: Use automatic tax calculation to create tax distributions for
prepayments. Manually created tax distributions for prepayments are
not included in the Distribution Total. If the Distribution Total does
not match the Invoice Amount, Payables applies a hold to your invoice
during Invoice Validation.>
Hope it helps ;°)
I'll keep you inform if I have further info about my case
Xavier