In home daycare. Do I enter vehicle expenses & miles driven under business, personal, or both categories? Is this something that I need to claim the same way each year?

I own an in home daycare.  Do I enter the miles driven for the business and reapairs and Maintenance under Business expenses, personal (job related), or both categories?  If I enter it in both will it split the deductions correctly or count the same vehicle twice?  Is this something I need to claim the same way each year?