=IF(AND(% Complete]3 < 1,[End Date]3 < TODAY()), "On Time", IF(AND([% Complete]3 < 1,[End Date]3 = TODAY()), "Due", IF(AND([% Complete]3 < 1,[End Date]3 > TODAY()), "Past Due","Complete")))
If i validate each part of the formula separately it returns my intended value however when I try to embed using IF AND, it is always returning Imparseable.