Hello Oliver, 

When submitting Employer Payment Summary (EPS), it doesn't include the Statutory Sick Pay (SSP). Hence, your EPS report shows blank or empty. Also, marking the employee SSP will automatically reflect on the FPS you sent to HMRC which they are already notified for it.

You can also use this link for reference about the process: Employer Payment Summary (EPS) in QuickBooks Online Advanced Payroll.

Please get back to us if you have additional queries. We'll be right here to further assist you.