here is a good article: note the section on self-employed and the part that states:
For business owners, the trip from home to your main business location, such as an office or store, is not deductible. Trips driven from there to other business locations, such as to call on clients, and from your last stop back to your main place of business are deductible.
https://www.hrblock.com/tax-center/filing/adjustments-and-deductions/mileage-deduction-rules/
