Hi there, @hello258.
Thanks for reaching out to the QuickBooks Community! I understand you need to start fresh with your payroll runs, but it sounds like you're running into issues changing the first pay date. Let me explain why this happens and provide guidance to help you resolve the issue.
This issue may occur if previous FPS (Full Payment Submission) filings still exist in your records, and QuickBooks locks payroll settings to maintain compliance with HMRC requirements. To address this, we'll need to delete the FPS and recreate it. Then generate a new FPS. Here's how to delete it:
- Navigate to the Payroll section using the left-hand menu in QuickBooks Online.
- Under the Payroll section, select Payroll Tax to view all FPS filings.
- Locate the FPS filing you need to delete, and click to open it.
- Click the Archived folder to be redirected to the Archived Forms page.

- In the Archived Forms section, set the date for when the FPS was filed.
- Select the Delete to remove the submission.

- Confirm by clicking Yes, delete to finalize the deletion.

To regenerate a deleted FPS, you’ll need to roll back and rerun the pay run to create a new FPS. Keep in mind that you cannot delete a single payment within a pay run. Deleting a pay run in QuickBooks will remove all employee payments associated with it.
Lastly, if you're unsure about payroll records with FPS filings, the best option is to contact our live support team for help. They can assist with the rollback process, correct pay runs, and ensure everything is applied correctly. Our experts can guide you through the process and confirm the best solution for your setup.
Once all this is done, you should be able to set your first pay date and continue with payroll processing without any issues, and we're here to make the process as smooth as possible. If you need further guidance or have questions about resetting your payroll or FPS submissions, don’t hesitate to reach out. We’re always happy to help!