What do I do for work related expenses if I drove my car but got reimbursed for mileage by my employer?

I used to enter mileage to get the deduction because I wasn't getting reimbursed by my employer.  I still drive for work (from one site to another during my work day), but now I get reimbursed.  I'm sure that means I don't enter mileage here for a deduction, but the only options seem to be to enter mileage or to say I don't drive for work any more, which isn't true.  What do I do?