How can I open a completely different business besides the one I already have there?

It's my pleasure to guide you in opening another business account in QuickBooks, mmartinjanda.

You'll need to create another QBSE account for a different business besides the one that you have. However, keep in mind that you will also need to pay for the new account as each company requires a separate account and payment.

To create an account, follow the steps below:

1. Navigate to the QuickBooks Self-Employed sign-in page.
2. Click Create an account.
3. Enter the necessary info. Make sure to use a different email address.
4. Select Sign Up With Email.
5. Follow the remaining on-screen instructions.

Feel free to read through these articles to help manage your billing and subscription in QBSE: Update your billing and subscription info in QuickBooks Self-Employed.

Also, you can read this article to help you record your self-employed income and expenses, track mileage, and prepare your Schedule C tax form: Overview of QuickBooks Self-Employed.

Let me know if you need further assistance in creating a new company by leaving a comment below. I'm always glad to help in any way I can. Have a great rest of the day.