Deductions & credits

And that's no problem, but I'm wondering how to actually fill that part out.  I had entered that work-related expense in previous years, but I skipped over it this year.  Then when I went through the final federal review, it insisted that I enter mileage since I've done that before.  So how do I get past that when I don't want to enter mileage because I'm not trying to claim it?