It's sad to hear that you're still experiencing the same error despite following the suggested steps, @JeanG. 

Please know that we are aware of the urgency of getting this resolved right away. Based on our records, the investigation (INV-97468)  is already closed. In your case, I recommend reaching out to our Phone Support team again.

I know that you've already gotten in touch with them, but it's the best we can do right now given that they have all the tools to look at your account securely through screen sharing to more precisely pinpoint the difficulties you've been experiencing when doing a payroll setup. 

Once the error is fixed, you can review this reference on how you can set up payroll successfully: Get started with QuickBooks Desktop Payroll.

Keep me posted on how it goes in the comments below. I want to ensure this is taken care of.