How do I edit my payroll period? I do not see the "Payroll and Services" under "Payroll Settings" I have Core Payroll

It's good to see you here in the Community, @petlover.

I'm here to help edit your payroll period in QuickBooks Online (QBO) Payroll Core. 

To verify, are you trying to edit a pay period for a payroll that isn't yet created? If yes, you can go to the Employees info and change the pay period from there. Here's how:

1. Sign in to your QBO account.
2. Click Payroll from the left menu, then select Employees.
3. Choose the employee you want to edit the pay period. Then, click Edit employee.
4. From the How often do you pay [employee]? drop-down, select the pay schedule for the employee moving forward. Or, to create a new pay schedule, select Add new and fill out the appropriate fields.
5. Click OK, then select Done.

I'm adding this article for more guidance: Set up and manage payroll schedules.

However, if you're trying to edit a pay period to the existing paycheck, you'll need to delete and recreate it. Let me guide you how.

1. Run the Paycheck List report, then find the paycheck with the incorrect pay period.
2. Put a checkmark on the paycheck and select Delete.
3. Once done, recreate the paycheck with the correct pay period.

You may want to run and customize payroll reports in QBO. This will help you view useful information about your business and employees.

Come back to this post if you have other concerns or follow-up questions on editing the pay period. I'll be around to provide more assistance.