Hi there, @cordell855-outlo. I can guide you on how to modify your payroll start date in QuickBooks Online (QBO).
If you've started processing payroll using the incorrect start date, you need to delete the entries recorded to start payroll over and input the precise start date.
Sign in to QuickBooks.
Go to the Gear icon, then click on Payroll Settings.
In the Payroll and Services section, click Pay Schedules.
Choose Edit next to the payment schedule you want to update. Or Delete to remove it.