"Thank you, see you later."
But then, which "you" do we mean in "see you later" ? You : male or female or males or females ?
I see you are level 11 in German. So, להתראות is alot like "Aufwiedersehen" in German. there is no "you" in Aufwiedersehen, it just a verb in its basic form. להתראות is the same, a verb in its basic form without any gender or tense.
Somewhere else I saw לך תודה meaning "thank you" and my impression was that תודה is just a short form/version of "תודה לך". Is that correct?