https://ttlc.intuit.com/community/tax-credits-deductions/discussion/business-usage/01/3613563#M346303 <P>My business usage % vary each year. &nbsp;Do I use an average annual % in computing gain and loss basis or do I take the % computed by dividing the total of business miles for all years by the total miles drove? &nbsp;Thank you.&nbsp;<BR /><BR /></P> Mon, 31 Mar 2025 08:57:45 GMT wchengkanhi 2025-03-31T08:57:45Z https://ttlc.intuit.com/community/tax-credits-deductions/discussion/business-usage/01/3613563#M346303 <P>My business usage % vary each year. &nbsp;Do I use an average annual % in computing gain and loss basis or do I take the % computed by dividing the total of business miles for all years by the total miles drove? &nbsp;Thank you.&nbsp;<BR /><BR /></P> Mon, 31 Mar 2025 08:57:45 GMT https://ttlc.intuit.com/community/tax-credits-deductions/discussion/business-usage/01/3613563#M346303 wchengkanhi 2025-03-31T08:57:45Z https://ttlc.intuit.com/community/tax-credits-deductions/discussion/re-business-usage/01/3613608#M346305 <P>Yes, you would calculate the mileage percentage by dividing business mile by the total miles driven.</P> <P>&nbsp;</P> <P>The IRS requires you to maintain a log of business miles driven.</P> <P>&nbsp;</P> <P>The log should include&nbsp;</P> <UL> <LI>Date</LI> <LI>Location</LI> <LI>Miles driven and&nbsp;</LI> <LI>Reason</LI> </UL> <P>If requested, the IRS would expect this documentation to confirm the miles driven.</P> Mon, 31 Mar 2025 10:57:53 GMT https://ttlc.intuit.com/community/tax-credits-deductions/discussion/re-business-usage/01/3613608#M346305 JohnB5677 2025-03-31T10:57:53Z