Attendance Register is coming to you, which means you have to maintain the Employee Attendance. I wonder how you can ask us what you have to do. You are working with an HR Department, and you must be aware of what an Attendance Register is and what you have to do with it. If no one has assigned you this task, you can speak to your supervisor/senior/boss about it first.
I have attached a document that will help you in maintaining the Attendance Register, and you can also search on Google for more information on attendance registers. If you know how to use MS Access, you can download a program for this as well.
Best of Luck