How do I access past paystubs in QB online payroll core?

Hello, @cfw1. We can access your past paystubs by going to Paycheck list page.

To access past pay stubs, you can pull up their paycheck history and view, download, or print the information you're looking for.

Here's how:
 

1. Go to the Payroll menu.
2. Select Employees.
3. Click Paycheck list under Run payroll.
4. You can select Filter drop-down to change the Date range or Employee.
5. If you want to Export to Excel or Print or save as PDF, click the Share dropdown.
    

For more details how to print paychecks on a QuickBooks-compatible paper check or pay stubs on plain paper in QuickBooks, you can refer to this article: Print paychecks and pay stubs in Online Payroll.

Also, in case you'll want to get a closer look at your business finances and employees' account, you can check out this article for some reports you can pull up: Run payroll reports.

You'll have me if you need any further assistance on how to set up paychecks in QuickBooks Online. Take care always!