Good day, adamadamhalper.
You'll want to scroll down to the bottom of the Miles page. This helps mark all your trips at once in QuickBooks Self-Employed (QBSE).
- Go to Miles.
- Scroll down to the bottom until the page reaches the end of the transaction.
- Click on the checkbox next to Date.
- Select Mark as business.
I've attached a screenshot below for reference.
You can check out this link and learn how QBSE can help you manage your taxes and forms: Manage taxes and forms with QuickBooks Self-Employed FAQ.
Let us know if you have further questions. We're here to help.