Among all GoProxy payment method, only Credit Card powered by Paddle will automatically add sales tax to the payment.

For example, if you are using an India credit card to place an order of our 1GB residential proxy plan via subscription. The first month offer of plan costs $5.8882=$4.99 (online price)+$4.99*18% (India sales tax rate is 18%).

Here is the link of the sales tax rate details for reference:
​https://tax-agony.paddle.com/