Good day, easttv.
I can assist you in amending your payroll. To do that, I need more information to lay out accurate resolutions. With this, I'd like to know what you're trying to rectify in your Payroll Core.
Did you experience any issues or errors when generating paychecks? To clarify, do you want to create a backdated paycheck from the last three months or add pay history? Do you want to delete all payroll data and start over? Please know any additional data would help us get on the same page.
I'm adding these resources for reference:
I'll be watching out for your response to ensure you get solutions. We're always ready to lend a helping hand. Keep safe.