My CPA emailed me that mileage has been a hot audit topic with the IRS for the last couple of years. She said that the IRS looks at the time I spend at work and the time I spend driving to see if I have any personal time left over. She stated that this is not an exact test but a reasonableness test. She concludes that if my miles pass this reasonableness test, the IRS should allow my miles without ... Log in to view full article.