Hey there office-kitchinn,
Thanks for reaching out to us here. QuickBooks Online is a great tool to have, it allows you to have multiple companies using the same login credentials. It's important that you know how to create a second subscription. I can provide some information on how to add another subscription to your account.
In order to add a second company to your account you will need to go to the QuickBooks Online site. Choose the plan that best suits your needs, It will bring you to a Sign up for QuickBooks page. Under where it says Sign up for QuickBooks you will see Already have an Intuit account? Click on the Blue Sign in option. It will then ask you to confirm your User ID. Once you have confirmed, it will bring you to where you need to enter your Credit card details. Once you finish entering your information, scroll to the bottom and select Buy QuickBooks Online. There you go! You have now added a second Company to your account.
If you have any other questions, feel free to reach out here.