What happens if I forgot to enter data?
Not a problem! We absolutely recommend that you try and enter the data as soon as reasonable after you've done the work, but you can enter data for any day in the past anytime. If you forgot yesterday, just do it today, but make sure you update the date so that the value is submitted for the correct day.
The one sometimes-exception to this exists on Do Less goals, because of the pessimistic presumptive report.
If you also derailed on the goal because you forgot to enter your data, enter the data and then reply to the legitimacy check email so that support knows to undo your derailment — the sooner, the better!