Thanks for visiting the Community, @MLom. As an insight, using QuickBooks Online Payroll Core, Premium, or Elite for the first time needs to meet all these criteria for Auto payroll to be eligible: 

• You have Full Service (available for most companies), Core, Premium, or Elite payroll
• All employees are either salaried or have default hours set.
• All employees are on a single pay schedule.
• Payroll setup is fully complete.
• First payroll has been run.

Otherwise, you’ll have to manually run payroll. Don't worry, QuickBooks Online will automatically calculate your taxes. 

For your reference, read through this article: Get ready to use Auto Payroll.

Looking forward to answering again in your next post. Have a great day.