1. Go to the Payroll dashboard, click on the Edit Company button and then go to the Contact Details section under Information. Populate the details for whom you wish to make the main contact in the relevant fields and then click the Add Contact button.  

2. You can edit contact details by selecting the pencil icon to the right and then clicking on the Update button. You can also delete a contact by clicking on the bin to the right and to change the main contact you will need to delete the current main contact until you reach the correct contact.