This can only be enabled through HMRC Accounts Office References. To access this this menu and enable the option, follow the below steps:
Click Setup and then select Codes.
Select HMRC Accounts Office References.
Find relevant Accounts Office.
Tick Include 3rd Party Figures in HMRC Remittance & EPS.
User should see the 3rd party payments is enabled within Employer maintenance.
In Order to add the App Levy, please use the App Levy Input screen next to the above tick box.
📌 Note:
For recoverable such as SMP, you would enter this on the EPS screen itself by adding the third party amount to the existing figures.
On this screen you also have Manual Tax and Manual NI - these are for the RTI Tax and RTI Total NIC figures from your third party software.