move payroll subscription

 It's nice to have you here, @superdave058.

 I can help you add a client's EIN to your payroll subscription, you can follow the steps below:

1. Select Employees, then Payroll, choose to Use My Existing Payroll Service. (If you don't see that option, proceed to The "Use my existing payroll service option is not available."
2. Under Identify Subscription, choose Use Subscription Number XXXXXXX [ Payroll Subscription Version ]. (If you don't see your own subscription in the list, select Other: I have an existing subscription and a Zip Code. And enter your information.)
3. Select Next.
4. When the Add Company Information window opens, select Next to add the company EIN.
5. Select Print. Or Return to QuickBooks Desktop. (Note: The Validating Payroll Subscription window opens and the service is added automatically.)
6. Verify the Service Key.

• • Select Employees, then My Payroll Service, then Manage Service Keys.
  • Select View to display the new service key with an Active Status.

You can get more information in this article:  Add an EIN to existing Payroll Subscription

Here are additional references that might be helpful for future use:

• Managing payroll subscriptions for multiple companies. 
• Manage your QuickBooks Desktop subscriptions and services. 

I've added an article that will guide you in running payroll in QuickBooks Desktop: Create paychecks.

If you have other concerns or payroll-related questions, please leave a comment below. I'll be here to keep helping.