Hello there, Dave. Let me discuss some information on how to access your pay stub history in QuickBooks Online (QBO).
As you mentioned, the functionality in QBO Payroll has been limited since the last update. Additionally, you've been unable to view historical payroll information and pay slips. As a workaround, your employer should provide an accurate pay history with the QBO Core Payroll setup. This is important as it affects the tax calculations and NI contributions.
To assist your employer in understanding the process thoroughly, I recommend sharing this article with them: Add pay history to QuickBooks Online Payroll.
Furthermore, you may also want to share these articles with your employer to provide further insights into payroll processes in QuickBooks:
Please tag my name in your reply on the Community forum for further inquiries about payroll-related matters in QuickBooks. I'm always here to help you further. Have a great day, and cheers to you, Dave!