How do I deduct can you write off gas on your taxes on my taxes?

Gas expenses are deductible when they are directly related to business activities. For example, if you use your personal vehicle for business travel, you can deduct the cost of gas as part of your vehicle expenses. However, commuting from home to your regular place of business is not deductible. You can choose between deducting actual expenses, which include gas, or using the standard mileage rate set by the IRS.