1. System settings > Global List > show all
search for: paypal_payment_url
Enter the value: https://secure.paypal.com/cgi-bin/webscr
search for: paypal_verify_url
Enter the value: ssl://www.paypal.com
search for: PayPal? Store
Enter here your store name: e.g MyVoIp? Shop
If you make here no changes your clients will see A2Billing
If you don't want to charge the paypal fee to your customers search for: charge_paypal_fee and set the value to "Yes"
In my system I don´t charge the customers. I accept payments starting from 5 EURO. If you accept 1 and 2 EURO (in the standard settings), you make your customer angry or you will get angry, when paying 1 EURO and the charge is 50%.
2. Menu > Billing > Payment methods > click to paypal view details
set the value to true and enter your paypal mail adress
Paypal website settings
Check where this file is located on your server :
Normally its in your domain/A2Billing/customer/checkout_process.php
Take the full URL from the checkout_process.php. In my case its http://myserver.net/a2billing/customer/checkout_process.php
Login into your paypal account
click to profile > Selling Preferences > Website Payment Preferences
set the tab "Auto return" on
Return URL: Enter your URL with the checkout_process.php in my sample its:
save the settings.