You can manually add past business drives by going to the Mileage tab and tapping the + sign in the top right corner. We recommend entering lump-sum business miles per month dating back as far as you wish. You’ll be able to add new mileage for the current or previous year.
Entering mileage by lump-sum should help greatly reduce the number of manual entries and get you up to speed on your year-to-date business mileage. Just make sure to retain any records of previous business mileage, such as a mileage log or report from another app, for tax (and audit) purposes.