Nice to have you in the discussion, @abundance8. I'd be glad to provide clarification on Accountant invitations.

QuickBooks Online Simple Start, Essentials, Plus, and Advanced are all able to invite two Accountant users. For additional insight into user limits, such as how many billable users are allowed, please see the following article: User access in QuickBooks Online.

I'm confident this information will get you back to business.

Should you have any questions about users, or anything else, please let me know. Have a good day.