Which headers you include depends on which information you plan to use in the mailing labels.
Place those headers in the first row of each column. The first thing you need to do is create a column header respective to the data that goes in each column.
If you haven’t created the list yet, despite Excel’s lack of the mailing label function, we still highly recommend you use Excel since it’s better for organizing and maintaining data than using a Word table. If you have already created a mailing list in Excel, then you can safely skip this test.