To create a Terms Code for PayPal, do the following:

• Dashboard | System Management | Term Codes (ver. 9)
  Dashboard | A/R | Term Codes (ver. 8)
• Add Terms Code
  The following page appears:
  
• Code - PP
• Description - PayPal
• Due Days - 0
• Discount Days - 0
• Discount % - 0
• COD - Unchecked
• Save

• Before setting up PayPal in Enterprise, make sure you have created your PayPal API Account.
• Dashboard | System Management | System | Payment Gateways.
• Click Add Payment Gateway.
  The following page appears:

• Description - Enter "PayPal".
• Gateway Drop Down - Select "PayPal".
• Market Type - Select "eCommerce".
• Login ID - PayPal API login ID.
       **This IS NOT your regular PayPal account login ID.**
• Password - PayPal API password.
       **This IS NOT your regular PayPal account password.**
• API Signature - PayPal API signature.
• Test Transactions- Not supported in current version.
       **Leave Unchecked for Live Sites.**
• Test Account - Check to process transactions in the PayPal Sandbox (for testing).
       **Leave Unchecked for Live Sites.**
• Save