We appreciate you bringing this matter to our attention, AAsk. We want to address this issue promptly so you can submit FPS to HMRC successfully.

Recently, we received similar issues where some users are having problems submitting FPS to HMRC. With that, we can follow the resolution provided by my colleague RoseJillB.

If you’ve already tried the troubleshooting steps above, I suggest contacting our customer care team so they can gather more details and work on a solution for your lost payroll record. Plus, you’ll be added to the list of affected users and will receive regular updates on our progress.

Moreover, I'm adding this reference that will guide you in restoring lost or deleted data in QuickBooks Online: Use the audit log to re-enter deleted transactions.

I'm always available to address all your payroll concerns or any QuickBooks-related topics. Feel free to update me by leaving a comment below.