Sometimes, you may need to make a correction to an order after you have posted a prepayment invoice for the order. You can add new lines to an order after issuing a prepayment, and then you can post another prepayment invoice, but you cannot delete a line from an order once a prepayment has been invoiced for the line.
You can do one or more of the following:
Issue a prepayment credit memo to cancel all invoiced prepayments for an order. On the order, click Posting, Prepayment, Post Prepayment Credit Memo (or Post and Print Prepmt. Cr. Memo).
Recreate the correct entries.
Reduce the amount in the Line Amount field (for example, because you want to reduce the quantity on the line). However, you must first increase the prepayment percentage on the line, so that the Prepmt. Line Amount is not decreased below the Prepmt. Amt. Inv.
Add new lines to an order after issuing a prepayment. Click Posting, Prepayment, Post Prepayment Invoice (or Post and Print Prepmt. Invoice), to make a prepayment invoice for the new line.
Issue an additional prepayment invoice. To do this, increase the prepayment amount on one or more lines and post the prepayment invoice. A new invoice will be created for the difference between the prepayment amount(s) invoiced so far and the new prepayment amount(s).