IRS Audit Tip On Mileage Deduction

If you take mileage as a deduction on your income tax return, the IRS audit tip below may help you.  Many individuals will claim mileage as a non-reimbursed employee expense on Form 2106, or if self-employed, on a Schedule C, or the deduction may even be stated on another business income tax return.  Most individuals know that to substantiate the mileage deduction they need to keep a mileage log stating where they drove, the total mileage and other information such as the business purpose for the travel.  What many individuals may not be aware of is that the IRS may also request them to verify the total mileage driven on their vehicle with third party records.  This issue is discussed below in greater detail.

Recently, I was involved with an individual income tax audit with a client over multiple periods of 1040 Schedule C (self-employed) filings.  The individual drove a decent amount in their business and had taken the mileage deduction on multiple vehicles that were used for business purposes.  The individual had maintained mileage logs for each vehicle and properly claimed the deduction on their schedule C.  During the audit, the IRS examiner requested that the individual obtain maintenance records to substantiate the total miles driven in each vehicle during the year.  This request was not to produce a mileage log of business miles driven, but records from oil changes and other maintenance records to show and verify the total number of miles, personal, business and commuting, over the course of the year.  For example, the examiner wanted to see the report from Grease Monkey stating the total mileage on the vehicle and be able to track and substantiate the mileage driven to see if the business miles claimed appeared reasonable and within the total mileage driven on the vehicle.

After the above incident, it is apparent the IRS is not only requiring a mileage log, but some form of 3rd party document to verify that the miles claimed are in line with the actual miles driven.  This being said, in addition to maintaining a mileage log, it is apparent that taxpayers taking the mileage deduction would be best served by maintaining all reports and maintenance records to verify their mileage.  Remember this the next time you take your car to the shop for an oil change or any repair!  It is probably best to even make a copy of the maintenance records and maintain the document with your mileage log and other tax related documents.  Tell your mechanic to keep the receipt clean!

John McGuire is a tax attorney and business attorney at The McGuire Law Firm.  Mr. McGuire’s practice focuses on tax issues before the IRS, tax planning, business transactions and tax implications to his individual and business clients.

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IRS Supporting Document Request

Taxpayers may receive a IRS Supporting Document Request from the Internal Revenue Service requesting supporting documents for certain items, issues or positions taken on a tax return.  Common issues of which the IRS would request a taxpayer support could be IRS Filing Status.  For example, if a taxpayer filed head of household, the IRS may want documentation to verify the dependent and elements that allow a taxpayer to claim head of household.  Furthermore, a common document request by the IRS is to verify children and the related elements that are necessary to claim certain tax credits.

Generally the taxpayer can compile the necessary records and documents, and forward to the Internal Revenue Service via mail and the document request is not necessarily an audit whereby the taxpayer would meet with an examiner.  If the taxpayer after reviewing the necessary requirements and elements realizes they should not have claimed a certain filing status or taken a specific position on the tax return, they can agree with an assessment of tax that would have occurred had the taxpayer not claimed a certain status, dependent, related credit or other issue.

The video below has been prepared a tax attorney at The McGuire Law Firm Denver Tax Attorney to provide additional information regarding the IRS requesting additional documents to support positions taken on a tax return.

John McGuire is a tax attorney in Denver Colorado representing clients before the Internal Revenue Service on matters such as IRS tax audits, IRS tax debts, United States Tax Court Cases and other tax disputes.  Additionally, John works with many small and medium sized businesses from a business start up and business formation, to contractual matters and the eventual sale of a business or business interests.  If you need to speak with a tax attorney or business attorney, you can contact John at


IRS Form 872

If you are being audited by the IRS, the IRS may request that you sign Form 872, which extends the amount of time the IRS has to assess you additional tax.  In essence, you are agreeing to extend the statute of limitations the IRS has to assess you additional tax.  Whether or not you agree to extend the statute may depend upon the facts and circumstances of the audit and tax period at audit.  If you are being audited by the IRS, it may be best to contact a tax attorney or tax professional to discuss the matter.  You can speak with a tax attorney in Denver, Colorado by contacting The McGuire Law Firm.  The video below has been prepared by a tax attorney to provide additional information regarding Form 872.

Schedule a free consultation with a Denver tax attorney- 720-833-7705 or

The McGuire Law Firm has successfully resolved IRS audits for many individual and business clients.

IRS Tax Audits

An IRS tax audit can be frustrating, confusing and scary!  You may be picked for audit at random, or maybe an item or multiple items on your return “red flagged” the tax return for audit.  The video below has been prepared by an attorney at The McGuire Law Firm to provide information regarding tax audits.


If you are being audited, or have a question or issue for a tax attorney, please feel free to contact The McGuire Law Firm at anytime.