@junecompany 

1. Click one of the following links

https:// quickbooks.grsm.io/US

https:// quickbooks.grsm.io/us-promo

2. Pick the plan you want to purchase

3. Click the Checkout button

4. You will see the "Create an Intuit account" page. Look below the "One More Step" button and "Important pricing terms". You should find  "Adding a company to an existing account?" Click the "Sign in"