You can set a task due date by adding the due date anywhere after the “/sendtask” command.
For example:
/sendtask Buy milk on the way home tomorrow
OR
/sendtask Tomorrow buy milk on the way home
OR
/sendtask Buy milk tomorrow on the way home
All of these examples will create a task titled “Buy milk on the way home tomorrow” (or one of the other two variations) with the due date set to the next day.