Summary
Within Microsoft Dynamics GP, Void or returned transactions are posted using the Receivables Posted 
Transaction Maintenance window. This window is modified in order to update the Scheduled Payment schedule 
data.
Window Layout

Processing
When a Credit transaction is processed, the Scheduled Payment schedule records are be updated so that they 
no longer are marked as allocated.
If the record exists on the amount applied will be set to zero and the Receipt number cleared.