Thanks for choosing QuickBooks Online in managing your business transactions, ajaising. I recognize how important it is to flawlessly open a new account. I'm here to help you with that.
You can open a new company file under the same QuickBooks Online account. However, each account has its own paid subscription, but you can access them with the same sign-in info. This lets you easily switch between companies while working.
Also, as mentioned by Fiat Lux - ASIA, you can use location if it's under the same EIN. Otherwise, you'll have to sign up for a new subscription.
To open an account, I'd recommend visiting the QuickBooks pricing page. Then, select the subscription. On the login page, click the Sign in link and enter the credentials used in your existing account. If you want to have two separate sets of credentials, enter a new user ID.
For more details, please see this article: Create or Add Another Company File to QuickBooks Online.
Additionally, I've included an article that'll guide you in setting up your new company file: Get started with QuickBooks Online.
I'm only a few clicks away if you need assistance with your other QuickBooks tasks, ajaising. It's always my pleasure to help you out again.