How do I add a second company to my QBO accountant. I want to add a second company (firm) not add a new client.

Hi there, 

It's great to hear that you're using QuickBooks Online Accountant to run your firm! I'd be happy to explain the process of opening books for a second company. 

QuickBooks Online is only equipped to deal with one company per subscription. The same goes for QuickBooks Online Accountant accounts. You're able to add as many clients as you'd like, but if you're looking to operate another firm account, this would require another subscription. 

To open a new QuickBooks Online Accountant account, take a look here: QuickBooks Online Accountant.

I hope this helps get your questions answered. If there's anything else I can do to help, just let me know. 

Have a great day.