For Credit card/Paypal Payment 2% Extra amount should be added
At the backend booking, the payment option is only for the purpose of recording the payment and payment method. It does not do the actual payment. You have to take the payment outside the system and you maintain a record that you have taken the payment.
Now, if you want that on selecting a certain payment method an additional charge gets added then we will have to customize it for you.
Please raise a ticket to discuss it further: https://webkul.uvdesk.com/en/customer/create-ticket/
Thank you for the information. As a temporary fix I found one method by using cart rule I can provide them 2% discount after increasing the product price.