When navigating to "Settings", then "Billing", you will notice either a "Edit your Billing Details" button, or a "Set up your Biling" button. This will depend on if you have already set up your billing.
By selecting this, you will be redirected to Stripe, where you can enter your information.
For individual users, the required details are as follows:
Legal Name
Email Address
Job Title
Date of Birth
Home Address
Phone Number
Percentage ownership of business
For business details, the required details are as follows:
Legal Business name
Registered business address
Business phone number
Industry
Business website
Before clicking on "Agree and Submit" you may have to upload verification documents. This is important as not uploading documents may cause issues and result in payments not going through.
You can upload documents by clicking on your name card, and uploading the documents there. You may also need to provide verification for your business by clicking on your business card, and uploading documents there.