This article will show you how to setup your payment processing with either Paypal or Authorize.net
1. Click on the "My Account" link within the profile and preferences section
2. Select the "Payment Gateway" then select your country (A) and your preferred payment provider (B)
If using PayPal you must have a business account. Enter your PayPal account e-mail address to complete.
If using Authorize.net you will need to enter in your API key and transaction key please see the following article on how to obtain those.
You know have completed your payment processor setup, please see the other KB articles in this section to complete your item setup and shopping pages.