Can I register through Student Planning or do I need to register for classes through the GoArmyEd portal?

If you are using tuition assistance from the Army, you will need to register through the GoArmyEd portal for the tuition assistance to cover the classes

Yes, as an Army student you must register through Student Planning.  Once registered, the university loads your enrollment to ArmyIgnitEd at which time you log in to the portal and submit a TA request for your enrollment.