Go to EShop -> Plugins -> Payments, then click on os_authnet to edit it

  1. Mode: Set to Test Mode if you are testing the system and set it to Live Mode when you go live.
  2. API Login: Enter API Login that you recieve from
  3. Transaction Key: Enter Transaction Key that you receive from
  4. Payment Fee (Fixed amount): Enter a fixed amount of payment fee.
  5. Payment Fee (Percentage): Enter a number of percentage of Sub Total as payment fee.
  6. Minimum Sub Total: Enter the sub total of order must reach to make the to be available as a payment plugin. Leave it 0 if you don't want to use.
  7. Customer Groups: Choose the customer group(s) to make the to be available with customers from that customer group(s). Don't choose any groups if you don't want to use.
  8. Tax Class: Choose a tax class for the payment plugin.
  9. Geo Zone: Choose a geo zone for payment plugin.

    Payment Fee = Payment Fee (Fixed amount) + Payment Fee (Percentage) * SubTotal / 100