You do not have to have your car's odometer readings. This is nowhere in the tax law, IRS regulations, IRS publications or elsewhere is there any requirement. All that is required is an adequate written record of the distance you drove. ... If you use a paper mileage log, you can continue to record your odometer readings.

Does the IRS require a mileage log?

It is a myth that the IRS requires you to record your odometer at the beginning and end of your trips. There's currently nothing in the law that requires you to log odometer readings except for the beginning and the end of each year, and when you start using a new vehicle.

How do I prove my IRS mileage?

By far the best way to prove to the IRS how much you drove for business is to keep contemporaneous records. "Contemporaneous" means your records are created each day you drive for business, or soon thereafter. A mileage tracker app like MileIQ may be one of the easiest ways to provide what the IRS wants.