Hello amadejero,
Once your QuickBooks Self-Employed subscription is expired, you'll be prompt to resubscribe. Afterwards, you can already view your mileage and other data.
After retrieving the data, you can cancel your subscription manually.
- Click your Business Name next to Settings (⚙) in the upper-right corner.
- Select Billing info.
- Click Cancel your account and follow the onscreen instructions.
You can also visit this link for QuickBooks Self-Employed Overview.
We'll be right here if you have additional questions.