To update your daily goals currently there are two ways.
Automated Pop-up
The first one is the automated pop-up that is shown the first time you login into the portal every week (we start our weeks on Mondays) so you can update your goals.
Manual Edit
The second way is to do it through your profile. I'll list the steps below:
Go to your profile page by clicking on the Profile link in the sidebar (or go to https://app.lifebac.com/profile)
Once on your profile, you should see an Update Goals button. Click this and you should be presented with a pop-up modal for you to edit your weekly goals.