After you have Save & Submit your final payroll, you need to file your Full Payment Submission (FPS) to HMRC. See Submit FPS to HMRC
You can submit the FPS on the Submission screen or Taxes > Payroll Tax > FPS. Note: As this is your final submission, we will automatically advise HMRC that this is your final payroll of the tax year.
Once you have submitted your FPS, you will receive a confirmation email from HMRC that your submission has been accepted, if you would like to see a breakdown of what was sent to HMRC, go to Taxes > Payroll Tax > Click the filing > Review