Hi everyone!
I am new here and i am starting this topic to ask you an help.
Last year i found this plant (pictures attached) in a nursery and would like to create a bonsai with it.
It has a double trunk and i am not sure how to prune it. Any suggestions?
Thanks a lot.

It has two tops, and then higher again two tops. It's not really a double trunk.

I think you can remove one of the upper two tops now - the left one. I'd also remove that branch that is growing upwards on the branch on the right.

I would remove the left top (the most damaged one). I probably would not do that now though, but I'd first repot it (when it's the time for repotting), next let it get stronger and grow more foliage.

Next you can start building it up again.

thanks a lot for your reply!
would you remove so much? i like the two horizontal branches at the bottom...
btw i agree with you about removing that branch that is growing upwards on the branch on the right.

seijaku wrote: would you remove so much?

I think I would - but not all at once, as I wrote.
The branches on the left seem very much damaged and useless.
The lower branch on the left - of which I cannot really see if it's part of the damaged ones - is on the same level as the one on the right.

Of course I'm only seeing a photo from one angle so probably there are other options.

Well, thanks a lot.
As for the lower branch on the left, it's difficult to say if it originates ffrom the damaged one...
It has a more interesting foliage than the one on the right and of course one of the two has to be removed.
I think i will do this way... your thoughts?

The foliage is a bit far from the trunk, but yes, it looks better at the moment.
However, you should think long term. Branches and leaves could develop.
I do not have a clear picture of the base of the branch though, so I cannot really advise.