Epicor - A/R

Account Receivable or Account debtor
In Trial Balance :
Received sale order
 Debit debtor : Credit Sales

If Undercharge :  Use debit memo to debit debtor a/c
If Overchage : Use credit memo to credit debtor a/c
If prepayment or advanced payment or deposit payment : Use allocated deposit payment (link to sales order) or unallocated deposit payment