________ del colegio tendrás que hacer tus deberes.
When you get back from school you will have to do your homework.
Cuando volverás
*Cuando hayas vuelto*
Cuando volverías
Cuando volviste
I still don't understand why "volverás" is wrong. In another Kwiziq lesson under: Learn about como, cuando, donde and quien in Spanish, one of the examples is as follows:
Hablo con ella cuando llega a casa.
I speak with her when she gets home. [specific situation]
Hablaré con ella cuando llegue a casa.
I will speak to her whenever she arrives home. [We don't know when she will arrive]
In the first case, the indicative is used even for a future event (ie. the event isn't until she comes home). Why is future then note used for "cuando hayas vuelto"?
Thank you!