Can I add my second business to my account, or do I need to have a second account?

One QBO account is for one company file. You need to signup for a second one. Another option, use QB Desktop to manage multi company files. If you are working solo, you can use the trial version for good if required.

It's nice to see you in the Community space, @ancestral-home. I'll be glad to share information on how you can add your separate business accounts into QuickBooks. This way, you can manage them seamlessly. 

QBO permits only one company per subscription. If you wish to create an additional company, you will need to register for a new QBO account. Each company will have its subscription. However, if you have an existing account, you can use the same login credentials when switching between companies.

To add a new company:

1. Go to the QuickBooks pricing page and select the subscription you want. 
2. You’ll see a page that asks you to create an Intuit account to buy QuickBooks. Scroll to the bottom and look for the small text that says “Adding a company to an existing account.” Select Sign in next to this. 
3. If you're signed in to QuickBooks, you’ll be asked to confirm the account you want to sign in with. If the account displayed is the one you want to use for the new company file, select Continue.
4. When asked, enter the same ID and password you already use for QuickBooks. 
5. Fill out all the information about your new company and you’re good to go.
   

Now that you have multiple companies, you’ll be asked which company you want to open whenever you Sign in to QuickBooks Online. To switch between companies at any time, select the Gear icon and select Switch company.

For more information, you can refer to these articles:

• Create a new QuickBooks Online company or companies.
• How do I switch companies?

Additionally, I'll be sharing these resources that will help you manage your QuickBooks Online subscription and to adjust your display settings in your dashboard:

• Get started and adjust settings after you sign up for QuickBooks Online
• Manage billing, payment, and subscription info in QuickBooks Online

Let me know if you have any questions about managing your accounts by leaving a comment below. I'm always glad to help in any way I can. Have a great rest of the day.