I am facing the same challenge trying to post third party charges to a purchase invoice. i have tried the suggestion above, by Adam, but the results were disappointing.
what i did was, i specified the cost account for third party expenses in the credit section of the the charge code. i also specified this same account in the Purchase Expenditure for Expenses posting type in Inventory posting for the third part vendor group.
after adjusting the charges on the purchase invoice, the item receipt account increased by the charge amount, and the third party expense account was credited. and then after posting the third party invoice, using a service type item, i posted the same amount, which increased the third party vendor’s AP, and debited the third party expense account.
this has canceled out the amounts posted to the third party expense account. any way around this issue? is it possible to tamper with the posting accounts in such a way that the expense account keeps it’s debit amount of the posted service purchase invoice?
please let me know if you’ve solved the issue already and if not i’d appreciate any input on this.