>Ok, (deep breath) I'm making progress. Now this credit memo business... I put an invoice with a negative balance. How/When does this get applied to the trips?
>
>Thanks,
>
Michelle,

You need to provide a program that will apply credit memos to invoices. With the credit memo you use the same two fields of Original balance and amoutn paid, only for credit memos the amount paid is the amount applied to invoices. At some point the amount paid and the original balance of the credit memo will be equal and that means the credit memo has been "spent".