To edit your Payment Settings, navigate to the "Account" icon in the upper right corner of your browser screen.
In the left column, click on "Payment Settings."
Click the green "Edit" button at the top of your browser window.
Enter your default Sales Tax Rate in the first field (as a percentage). So, if you collect 8.75%, you'll enter "8.75" here.
In the next field, enter the Minimum Initial Deposit Percentage you require to confirm Orders. For instance, if you require Clients to pay 50% upfront, enter "50."
To enable integrated Credit Card Processing within your RW Elephant account (which also allows for Online Payment Pages and Autopay Features), click on the "Connect with Stripe..." button to start that process. Check out the Integrated Credit Card Processing Tutorial for more information about setting that up.
Be sure to click the green "Save" button when you're done editing your Payment Settings to save your changes.