For Payday Filing you'll need to connect your Company myIR account to PayHero. Our support article on Payday Filing goes into further detail regarding how this works.
First go to Manage > Integrations and click Connect next to Inland Revenue.
You will see the following pop-up and be prompted to enter your myIR details.
After entering your user details and clicking 'Login' you'll see the following window once you've successfully connected.