Q.Angel trumpet plant
I brought my plant in the house over the winter. It is a little over 3 feet tall. The branches are green, but not getting any leaves on them except close to the bottom. Do I need to prune it back to get it to produce more leaves?
It would not be unusual for your plant to show little new growth while indoors.
I would continue to care for the plant and wait until you move it outdoors to give it a pruning.
Here is a link with information on wintering over a Brugmansia.