ter/Of the due date of the return or the date the return is filed. The returns required to bo made available for public inspection are Form 990-PP, Rettivn of Private Voundatien or Section!4947(a)(1) Nonexempt Charitable Trust IXeatod-as a Private Foundation, and Form 4720, Return of Certain.Sxcise TaieirUp Charities and Ot