Hello. I'm not sure about the use of "have" in question tags. In the sentence "They had the TV in the lounge" if I want to add a question tag should it be: "They had the TV in the lounge, hadn't they" ...

A tag is a question added to a declarative statement to indicate uncertainty or to request confirmation (e. g., "Sally likes candy, doesn't she?"; "He is not going home, is he?"). 50 normal children ...