Go to Inquiry › Input Vendor Number › Select A Particular Invoice or All, highlight the invoice, select Reverse Invoice and then either Post to Current Month or Post Ahead.
First you need to go to your main menu and add the salesperson in users with no security if they are not going to be accessing the system and then go into Finance & Insurance and go to Setups -> Personnel. Add the new salesperson and input the particular’s for commission, save and then exit.
No, once you have turned a quote into an invoice then you have to zero out the on-hand quantity and print to close. You may close a quote but not an invoice.