You can sign up for QuickBooks Payroll either via the Internet or by telephone.
You can sign up for the service or convert to QuickBooks Payroll from another integrated payroll service through the QuickBooks Payroll web site.
If you don't have an Internet connection
To sign up by telephone, contact the payroll service.
A service representative will collect some basic information from you and provide you with a payroll service key, which you use to complete the sign-up process.
See also
Am I already subscribed to QuickBooks Payroll?
QuickBooks Payroll sign-up checklist
Activating Direct Deposit
Subscribing to QuickBooks Payroll