From the Main Menu, Go to Leads -> Sold Leads
This will take you to the Sold Leads Report.
Select the leads you want to return by clicking on the check box next to the lead.
Click Return Leads...
The Return Leads window will open.
Return Reason: Select the Return Reason. If the dropdown is empty, you can add Return Reasons by going to Settings -> Lists -> Lead Return / Scrub Reasons from the Main Menu.
Replace Returns: If checked, the lead price will not change and the next generated lead will be delivered to the same Advertiser Contract for free if the lead price matches the returned lead price. If unchecked, The lead price will be changed to $0.00.
Scrub Return Leads: If checked, the lead will be returned to the affiliate and the price will be changed to $0.00.
Click Return Leads.