Let me help share insights about your payroll report, @R K.
As of the moment, there isn't an integrated way to turn off or remove the automated new hire report in QuickBooks Online Payroll. This report is displayed on your to-do list of tasks as part of your new payroll account setup.
Since your client doesn't want to use this report and employees' data have been entered accordingly, it's best to leave it as it is part of the program reporting design.
I'm adding this article which may come in handy that contains all the payroll report you can utilize while working with us: Run payroll reports.
If you got questions other than this payroll report concern, please let me know using the Reply button below. I'll always be around ready to assist you. Take care and stay safe!