How to set up PayPal and Credit Card in NopCommerce ?

PayPal is one of the most widely accepted methods of online payment in the world; it only makes sense that many e-commerce sites use it as a means of accepting payment from their customers. PayPal Email Payments is an easy-to-use payment solution that lets your customers pay online using a credit card, bank account, or PayPal balance. PayPal is one of the most popular and trusted ways to send and receive money online.

nopCommerce is open-source ecommerce solution. It's stable and highly usable. nopCommerce is an open source ecommerce solution that is ASP.NET (MVC) based with a MS SQL 2008 (or higher) backend database. Today, we’ll go over how to integrate PayPal payment processing with your nopCommerce site. 

PayPal Setup

• First, You must log into your PayPal account. Right under the My Account tab, select Profile -> My Selling Tools.
• Under the section My business setup, you’ll see Website preferences – click Update on this line
• Turn Auto-return to On, and enter “http://yourdomain.com/PaypalPDTHandler.aspx” for “Return URL”
• Then, Turn Payment Data Transfer to On
• All entries below this are optional, based upon your business requirements.
• Click Save

On nopCommerce

Log into your nopCommerce instance as an administrator, and navigate to the Administration area. Click on “Configuration”>”Payment Methods”: click on the “Configure” link next to the entry for “PayPal Standard”.

1. Uncheck the box Use Sandbox
2. Enter your PayPal account e-mail address for “Business E-Mail”
3. Next you’ll enter your “Identity Token” you’ll obtain from your PayPal account into the field “PDT Identity Token”
4. Leave “DT. Validate order total:” checked
5. If you wish to charge an additional surcharge for PayPal transactions, add your surcharge to “Additional fee:”
6. Check both “Pass product names and order totals to PayPal:”, and “Enable IPN (Instant Payment Notification):”
7. For IPN Handler, enter http://{YourStoreURL}/Plugins/PaymentPayPalStandard/IPNHandler
8. Click “Save”.

For Credit Card 

1) Go to Admin section > Configuration > Payment > Payment Methods
2) Select "Manual Processing " > Click on "EDIT" against it
3) Mark the checkbox "Active:"
4) Save Changes

PayPal
I am assuming that you want to configure PayPal Express .
1) Go to Admin section > Configuration > Payment > Payment Methods
2) Select "PayPal Express" > Click on "EDIT" against it
3) Configure the settings
4) Mark the checkbox "Active:"
5) Save Changes