Changing the Total Sales balance that appears in this window
If the balance is too low, you may need to add a sale that occurred before you began using MYOB AccountEdge. To do this, click the Add Sale button to display the Historical Sale window, and use that window to enter information about the missing sale.
If the balance shown is too high, you may have made an error when entering your sales transactions. First click the Customer Detail option and choose the customer whose balance appears to be wrong. The customer's open (unpaid) sales will appear. Locate the erroneous sale and click the zoom arrow next to it; the sale will appear in the window where it was originally entered. Depending upon the preferences you've chosen, you can use that window either to edit the transaction or to reverse it and reenter it.