QB Issue Resolution:

First, you’ll have to contact HMRC, and verify if you can delete and resubmit the payroll.

 

Then, if you’ve both agreed to delete the payroll and start over again, here are the articles that can help you depending on your payroll subscription:

If they don’t want it deleted, you’ll have to move to the next payroll run. Just make sure the information will be correct already.

Resolution for Issue 'Mistake in payroll but it has already been submitted. can it be deleted and start again?' available: Yes (Solved).
Source: Intuit Community forum.

Mistake in payroll but it has already been submitted. can it be deleted and start again?: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

Support for HMRC
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