I suspect that you probably claimed a very high % of total mileage for business use..they assume that most people have about 10-12k miles for personal use..IOW..if you drove 36k miles that year, 18,000 for business is normal..however, if you drove only 24,000 miles total, then 18k for business isn’t the norm, and the assumption is that you’re tinkering with the numbers..also..your comments are a tad confusing..either you claim the IRS allowed mileage rate, OR your actual expenses...you can’t do both...so all you need is your diary..showing the mileage..don’t even bother with gas receipts and repair costs...
“..either you claim the IRS allowed mileage rate, OR your actual expenses...you can’t do both...”
I only claimed my mileage. Was just wondering if I should present all expense receipts...or just the proof of mileage.