If you haven’t signed in recently, 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. When asked, enter the same ID and password you already use for QuickBooks
If you recently signed in to QuickBooks, you’ll see a page asking you to confirm the account you want to sign in under. If it’s the account you want to manage the new company with, select “Yes, that’s correct.”
3. Fill out the information for your new company.
You'll be asked which company you want to open whenever you sign in. If you'd like to switch between companies, Click Settings ⚙️, and select Switch Company.