Looks like a type of swiss cheese plant . Usually you dont cut it back.

I would say it's Philodendron bippinatifidum. It's not easy to say how to cut them back as they are supposed to be grown as a large specimen plant.

You could possibly take the main trunk right down to soil level and allow the other smaller ones to grow but, in my opinion, what a waste !!!!

I would also say Philodendron and if it really annoys you remove the leaves from the bottom up to make a trunk. The newer upper leaves tend to be more erect.

I agree with Andyj!

If you haven't got room for it best give it to somebody who has.

Oh my, its gorgeous! I would leave it as is.