Your payment method, bank account detail, terms of business and any other messaging you would like to include on your invoices can quickly be set up via the Admin / Setup Checklist area.
Payment Details are located at the bottom of the subscription detail section. There is a free text field for you to enter your required business information.
Step 1: Select Admin > Settings and scroll down to Invoices to enter in Payment Details
When happy hit Save on the right.
See an example of how the Payment Details show on your invoice: