"The plane tickets, you printed them?"

Translation: Les billets d'avion, tu les as imprimés ?

[LoganDavis4]

Why do we have to make imprimé plural? It's not a past participle that requires être rather than avoir

[jwbards]

If the direct object of the sentence precedes the participle, the participle will match the direct object.

[MyLowww]

Why not les as tu imprimés

[Seattle_Scott]

As-tu les imprimés...

[SeanFogart4]

No, les must come first. Les billets d'avion, les as-tu imprimés ? -- accepted 2020 August 13

[Rnbwsnsnshn]

Maybe you made a mistake somewhere else? "les as-tu imprimés" worked for me.