Answer:
Passive voice: The parcel have to be sent by you today.
Step-by-step explanation:
The above is the passive voice of the given sentence.
Passive voice is known to be more interested in the person or object that actually undergoes or experiences the action. This means that the subject becomes the one the verb acts on. In other words, passive voice actually pays more attention to the person or object that receives the action than on the performer of the action.
From the given sentence, we see that in its active voice "You" is the performer of the action and "parcel" is the receiver of the action.
But when changed to passive voice, "parcel" now becomes the subject and given more attention.