Hello there, pizzapizza. I'm here to address your migration concern and provide a resolution.
To clarify, are you looking to combine your two existing QuickBooks Online (QBO) accounts and your QBO Payroll account into one? If so, please note that this isn't possible, as they are treated as separate entities.
However, you can consider canceling your QBO Payroll account and adding the payroll subscription to your QBO company as an add-on. Before you proceed with the cancellation, make sure to export and save any necessary data from your QBO Payroll account so you can manually enter the essential information into your QBO company.
You can refer to this article about setting up your employees in the program: Add your new employee to QuickBooks Payroll.
Additionally, you can also invite your employees to QuickBooks Workforce to see pay stubs, W-2s, and more if you use QuickBooks Online Payroll.
If you have any further questions or concerns about merging your accounts, please don't hesitate to reach out. We’re always here to help, pizzapizza. Take care.