I need to know the number our Payroll Service Key, Please.

Greetings, @alvarez-fausto.

I'd like to make sure you're getting the right support in getting your payroll service key. Let's get started!

To start with, I just want to clarify what specific QuickBooks payroll product you're using? 

If you're using QuickBooks Online Payroll, you'll no longer need to enter a payroll service to activate the payroll service in your account. You may check out the video below on how to set up payroll on your end.

On the other hand, if you're using QuickBooks Desktop Payroll, you'll usually receive the payroll service key via email. If you haven't receive one, you can use our automated Service Key Retrieval tool in acquiring one. 

If you're having difficulty retrieving your payroll service key, I'd recommend reaching out to our Payroll Support Team. A payroll specialist will be able to access your account on a secured environment and provide the information you need.
 
Here’s how to contact us:

1. Visit: https://help.quickbooks.intuit.com/en_US/contact.
2. Select your QuickBooks Product.
3. Choose  Payroll.
4. Go to your type of Payroll Subscription.
5. Hit Payroll.
6. Click on the View Contact Info button to see the support number.

Stay in touch with me and let me know how it works on your end. I 'm always here to help you activate your payroll subscription.

My payroll system stopped functioning and I don't understand why.

payroll was activated but stopped functioning, need assistance

It could be a network update interruption, Sal40.

Let's try resetting your payroll update by following these steps:

1. Click Employees, then Get Payroll Updates.
2. Click the Download entire payroll update radio button.
3. Click Update.

Once you're done, try going to the Payroll Center again to see if the payroll is now working.

You might also want to check out this article for your reference: Troubleshoot Payroll Service Server Error or Payroll Connection Error.

If you have any more questions, please don't hesitate to reach out anytime.