You can manage the payment settings of your eBay listings using Payment Profiles.
Payment Profiles are found in Sell on eBay under Channels.
To create a Payment Profile, click on the 'Add New Payment Profile' or 'Add Payment Profile' button. The 'Add New Payment Profile' button will only display if you have no saved Payment Profiles.
Complete the settings and click the 'Save Profile' button to create the Payment Profile.
Payment Profiles have an associated synch setting to control how updates to the Payment Profiles affect live listings. The synch control can be found in Settings in Sell on eBay. By default the synch is turned ON. When this setting is set to ON, changes to a Payment Profile will revise any live eBay listing that uses the profile.
To attach a Payment Profile to your product(s), go to Catalog -> View Products. Click on the title of the product you wish to add the profile to then click the 'eBay Settings' tab on the left.
Scroll down the page to find the Accepted Payments & Taxes section. Click the paperclip icon to bring up your Payment Profiles. To remove a Payment Profile, click the '-' (dash) icon.
Find the Payment Profile you wish to add in the popup and click the 'Attach this profile' button. When you are completed with your product, please remember to save it.