I have been reading this :
do i need to create 2 variables to archive this ? i have created a calculation for -1 day calculation but when i tried to query the list , when should i select to filter ?
You could only use 1 variable named "PriorDate" and use it on your reminder
Would you be able to make a site workflow which queries your entire task list for all items that have a due date of [Today] plus one day?