Thank you for replying to my post! If I keep my Serissa inside year round...
Well, they like fresh air and sun, so if there is a way, it should be outdoors.
The "leggy" branching could be from lack of light; they grow bigger leaves and longer internodes when not in full sun.
When you say the second branch from the trunk do you mean this one? And I just make a cut just above this branch? Just want to be sure since I have never done a hard prune before.
If you have never done a hard pruning, seek help from a friend who does bonsai.
I'm serious.
There is a chance, even if you repot in the right time (beginning of the Spring), there is a chance the tree dies from stress.
It's a tough one: You have to prune to control the legginess, but hard pruning is always a big risk.