There are three different ways to check your Bike Angels points.
As soon as you dock, you'll be sent a push notification on your phone with the total points for that trip along with your monthly and annual total. Make sure to activate push notifications for the Citi Bike app in your phone's settings!
If you have your docking notification emails turned on within your member profile, you'll receive a "trip receipt" in your inbox with details of the trip (including Bike Angel points) each time you dock.
You can also head to the statistics section of your member profile on Citi Bike's website to check your monthly and annual point total, along with the points you earned on your most recent trip.