I volunteer at a charity and drive to the organization. Can I deduct the mileage?
Personal TaxIf driving for charity, keep track of the mileage, date and purpose of the trip, and get an acknowledgment from the charity. Taxpayers CAN deduct on Schedule A 14 cents (2018) per mile for charitable driving, plus what they pay for parking and tolls.
Lacking the proper substantiation can cost you a charitable deduction. We suggest using MileIQ mobile app.
via Kiplinger Tax Letter