Thank you for contacting us about adding a second business to your QuickBooks Self-Employed (QBSE) account, joshj200-gmail-c.
You can consider subscribing to a new QBSE plan to create a second business with the same information. Check out this website and subscribe for your second business: https://quickbooks.intuit.com/self-employed/
Please know that the QBSE account is equivalent to one self-employed business/job and will generate one Schedule C categories. With that being said, you can create a second account and process as like as the first account.
You can always visit this link: QuickBooks Community help website if you need tips and related articles in the future.
Don't hesitate to post again if you need additional information about adding a second QBSE account. I'll be right here to help you.