Though it is not entire correct, It's okay if you are using it when you are directly speaking to the person. If you were to use it, the る part should be pronounced as if you are implying a question. If you are using it for writing, it's an uncomplete sentence いつ家に帰る? = For casual speaking; do not use in formal writing. いつ家に帰るの？ = Both writing and speaking 「の」in this case serves the similiar meaning to 「か」, but both serves a different purpose. When using 「の」、most of the time it refers to the person intention of doing certain thing while 「か」is just straight up question. In some case both of them can replace each the other.

Japanese Humor 101!!!! When someone ask "when" question, you say "今でしょ", then people will love you lol We have this guy who say this, and now people stated to make fun of it. So it is pretty funny :)