Hi Koala,
KeyPay is our app partner who powers the QuickBooks Payroll feature. They are a separate company from us but we work closely together to deliver an STP compliant payroll solution within QuickBooks.
If you decide to use KeyPay separately from QuickBooks and intend to bring in KeyPay data into QuickBooks later, you can contact KeyPay Payroll Support from within the Employees module to connect your KeyPay account to your QuickBooks file.
Bonny