Uploading Time data

Hi guys

Can anyone tell me how to go about collecting leave data. I would like to come up with a template that I can give the client so that users can populate it with data. What I am not sure is apart from name, employee number and leave balance (days) is there anything else I need to be included in the template? Also I would like to know which infotypes in Time Management are required for this upload.

Thanks in advance.