Go to Control Panel > EMP Configurations > Trading
Search for 'Extended Warranty Item Search for Members Only'.
If the extended warranty would be for members only, make sure to check the box.
Else, remain the box unchecked.
Then go to Inventory > Item > Add Item.
Fill in the Item Code, Item Name, category etc and make sure the item type is 'Warranty'.
To sell to customers, go to Fullscreen Cashsale/Create Invoice.
Select the item you would like to sell.
Select the 'warranty item' and fill in the Product Serial No of the item which is sold.
The price of the extended warranty will match the price you created in the Add Item function.