My employer reimburses mileage, but not at the Federal level of $.55/ mile. Can I write off on my taxes, if I itemize my deductions, the difference between what I get reimbursed by my company and the Federal limit? Answer Yes. The difference will go on your Schedule A,
line 21- "unreimbursed employee expenses." Describe it as "unreimbursed portion of .55/mile business miles" or something ...