Hello there, simonb1,
You can only submit EPS (Employer Payment Submission) between the 6th and 19th of the month. If you miss the submission period, you can submit the EPS in the following month.
You might not be able to file the EPS if:
To submit EPS to HMRC, you can follow these steps:
To know the status of the submitted return, you can see all previous filings from the Payroll Tax Centre.
If you have any other QuickBooks issues, don't hesitate to post again. I'm happy to help you.