The business use of your car deduction allows you to write off the cost of using your personal vehicle for work-related travel. You can choose between deducting actual expenses (gas, repairs, insurance, and depreciation) or using the IRS standard mileage rate.
To qualify, the driving must be directly related to your business, not personal errands or commuting. Keeping accurate mileage logs and receipts is key to claiming this deduction correctly and maximizing your tax savings.
For more information click in this link: IRS.gov