I appreciate you providing detailed information of the things you've tried, @MAINADMIN.

The error message usually is fixed when trying the steps on this article. Anything beyond that is performed with the use of our screen sharing tool. Since you've already called, you must have a case number about this.

Community is a public forum. I would love to check the status of your account, but the security of your account is my top priority. Phone support has access and tools unavailable to me so that your information is kept secure and private.

I'd advise to call us again to check the escalation about the Another QuickBooks users (Accounting) is currently performing a task error message. Please open this link to get their new and updated phone directory: Contact the QuickBooks Desktop Customer Support Team.

Let me know how it goes. I'm here to ensure this is taken care of. Keep me posted by leaving a comment below. Take care always.