Until they are printed they will never leave current. This behaviour cannot be changed on a customer by customer basis (current release).

The answer from Softrak SUpport is one way around this. Another is to print to file and then delete the file. To limit the amount of printing you can select the entire range (blank to zzzzzz) and make sure the reprint option is not selected. You can make this part of your month end routine to clear these invoices at every month end.