A pivotal step in creating your account is to set up a reliable payment method. You can find your payment methods under the Finance tab in the client portal.
You can also add a new payment method by selecting the +Create button in that section.
Some things to note:
Credit Card processing carries an additional 3% fee.
The payment marked as the "Default" will be the payment charged, so please make sure the most up to date method is marked as the default.