Glad to see you again, @cdhodgdon.
I've got just the information about tracking business miles to suit your needs. Ideally, the right way to track this trip is by counting mileage starting from the office.
Since you're operating the business from home, you can deduct business-related car expenses for travel back and forth from home to business locations for business purposes. These expenses include all the costs of running your car, under these circumstances:
- You work at home in your home-based business.
- Your home is your principal place of business (the place where you earn most of your income or where you do your administrative or management tasks).
- You can prove that the car expenses were business-related, not personal.
It'd also be best to consult a tax expert to properly guide you with tracking this mileage. You can check this article for more information about the trips that are categorized as a business: Learn how QuickBooks Self-Employed calculates your mileage deduction.
Let me know if you have additional questions. I'm always here and ready to help. Take care!