Prepayment invoice matching with PO

 Hi,

I want to match Prepayment invoice with PO. As per my understanding first on po level distribution i have to change matching option Receipt to PO. Then i can enter prepayment invoice using prepayment po field and theni have to match this prepayment with PO. Still now there is no receiving. When i matched inovice with po it put hold qty acceed that i  can manully release.

After that i have to enter standard invoice which i will apply to prepayment invoice. here my question is in distribution which account i have to give because i will not match this invoice to po again. e.g if i will charge account here then it will be duplicate charge account will debited one dr entery will come from Purchasing and one will come from AP.