Yes, you can have more than one QuickBooks Self-Employed (QBSE) account, dvargas-mediadis.
However, you need to purchase a new subscription and use another email address for the second business. Let me walk you through the process of creating a second account.
Enter the necessary info. Make sure to use a different email address.
Click Sign Up With Email.
Follow the remaining on-screen instructions.
Here's an overview of everything you can do, how to get set up: QuickBooks Self-Employed Overview. It tells you how QuickBooks tracks everything throughout the year.
If you need details about the bundle pricing of the program, go to this link: QBSE Pricing.
Please send me an update by commenting below if you have additional questions about creating multiple QBSE companies. I'm always right here to guide you.
One QBO/QBSE account is for one company file. You can manage branches/divisions by utilizing the Class/Location feature available in QBO Plus and Advanced. Otherwise you should open a new account.