"You have to give this pen back to the director right away!"

Translation: Tu dois rendre ce stylo au directeur tout de suite !

[Frederick_W_V]

Wow. "vous devez" is rejected. "à la directrice" is rejected.
Really only "tu dois rendre ce stylo au directeur tout de suite" is the only correct answer?

[--Roody--]

Your replacements look fine to me. But if you want our best opinions, you should copy and paste your entire sentence.

[MurielCalder]

Can you use retourner here instead of rendre ?

[Carro51]

Il faut que tu rende.....à la directrice..... Is this OK? Rejected