Hi Keith,
Welcome to Auctiva!
As you are creating your listings through Auctiva, you will indeed want to enter the Paypal email address you use to accept payments from buyers in the field labeled "PayPal notification will go to" within the Checkout Options section.
I hope this helps. If you need any further assistance with your account, please feel free to contact our Customer Support team by mousing over the "Help" tab and selecting the "File Support Case" option.
-Mike