On January 1st, your Hurdlr account's default view switches to the new tax year.
To see and edit your tagged drives from last year:
On the mobile app:
Go to the Reviewed section of the Mileage tab
Tap the gray bar with this year’s date
Select last year’s date from the drop-down
On the web app:
Go to the Mileage page
Click the "Date" filter
Select last year’s date from the Date drop-down
To view a detailed mileage report for any time period you can export your mileage reports