A payroll subscription is tied specifically to the company file it was created for, so transferring it from one company to another is not possible, GrahamM26. You'll need to set up payroll in your other QuickBooks company to properly track your data and meet tax and reporting requirements.
To add a payroll feature to your other QuickBooks company, follow these steps:
Go to the Payroll menu, then select Choose your plan.
Select the plan that suits your business needs and click Subscribe for a paid subscription. You can Start 1 month free trial if you have a trial account.
Follow the onscreen instructions to complete the process.
You can also subscribe through the Gear icon. If you wish to do so, here's how:
Go to the Gear icon, then select Subscriptions and billing.