how to post multiple invoices for the same Service Purchase Order?

[Former Member]

Hi,

Please find me a solution to post multiple invoices to a single service purchase orders.

I have many services purchase orders and the suppliers issue us invoices on a milestone basis/work progress/monthly/after delivery. I need to post invoices on a partial basis but the purchase order says "closed" when i try posting the next invoice.

Is there a way to clear the service purchase orders partially? Or is there a way for me to link the invoices with the purchase order later by doing something manually? (because i posted the invoices without considering the purchase order because of the issue mentioned above)

Please provide me a step by step process if possible.