Smita
If your report only outputs in CSV, you do not really have to worry with the formatting. What you can do is access the Print Setup of the report and tick the 'Output to CSV' box. This should prompt you to change the grid to a different width (can't remember the number).
Align your fields on the grid, one field per column even if they overlap, and they should come out just right in excel.
Hope this helps
Philippe