This is where you apply pre-pay to an existing SO.
Path: Home > Customers > Sales Order > Select SO > More > Create Pre-Pay
Upon clicking “Create Pre-Pay” you’ll be routed to the “Create Receive Payment” section for you to apply the deposited amount. After saving, it will reflect on the Payment Memo.
Once you process the invoice and then save, the system will advise you to apply an existing pre-pay for the SO.
Proceed by clicking on “Yes”, then select the pre-pay created earlier (Trans. # 155891). Lastly, click on save.