Not a while ago, I faced the QuickBooks Error 9999 in my system while trying to update my account details. So I reported it back to the QuickBooks team by following these steps.
l In the error message, you will find an option of Report Issue. Click on it.
l Now, enter your name and e-mail and click on Submit.
l Wait for 10 business days and so to get revert back on the issue.
If you need a solution that could instantly solve the issue, read this blog. However, to get immediate assistance from an expert on the issue, call on xxx-xxx-xxxx anytime.