Yes, you can add three company files under one payroll subscription as long as you add the EIN to each of your company files, AT6.
It can be that the EIN wasn’t added to the other company file. That is why QuickBooks requires you to sign up for another payroll subscription.
I have here an article to share with you where you’ll get further information about the requirements and limitations of the payroll subscription. Aside from that, you'll learn on how to add an EIN to your subscription: Add an EIN to existing Payroll Subscription.
Also, I would recommend contacting our payroll specialist can help you add another company file to your existing payroll subscription. Also, they can also help you cancel the other subscription.
Here's how to contact them:
- Click Help from the main menu.
- Select QuickBooks Desktop Help or you can press F1 on your keyboard.
- Click Contact us to talk to one of our specialist.
Also, please consider checking our support hours visiting this article. Then, go to the QuickBooks Desktop section to see the time schedule.
Please know that I am right here anytime you need help about QuickBooks Desktop payroll. You can mention my name if you would like to. Take care!