You can have multiple merchant accounts. In new projects, but only one per project.
When creating a new project, you'll be prompted to select an existing merchant account or add a new one. Click the button to set up an additional merchant account, and a sidebar will appear to complete another merchant account application. Once approved, you will be able to select any merchant account approved on your account. We recommend setting up additional merchant accounts when you would like the option to process in another currency, or you would like deposits to go into a different bank account.