WELCOME to the bonsai forum.
Most of us here are not familiar with this tree and thus can not give specifics on where and how to prune. But if yours has a history of flowering in Feb. you should probably wait until after the flowering stops.
Can you provide pictures? That would help a lot.
Let's all learn together.
Last year we had some postings from Thailand. I hope those folks will see this and come back on the board to help out.