This is not a my|HACC issue. If the user is an employee and they are missing the Employee tab in my|HACC, it's because they are not in an Employee Group in Active Directory.
If they were recently hired/ re-hired, please ensure requester has submitted a Systems Access Request. If they have not, have them open one, and either mark the issue resolved, with a note they can reply om 15 days if the issue persists after the SAR is complete, or they can just open a new request, but to the AD team, not my|HACC.