Hi.
We don't know for sure that any other planet has life. Scientists are especially interested in Mars, though. That is a big reason why they are searching so hard for liquid water there - liquid water might mean life and it does seem like Mars may have had liquid water at some time in the past at least. There is also some interest in Jupiter's moon Europa, which it thought to have a slushy water ocean beneath its icy surface.

Of course, there may be planets with life on other solar systems. We are not able to observe planets in other solar systems, especially the small, earth sized ones, well enough to tell at this point,

Terry