Do not enter social security numbers on this form as it may be made public. Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS.File the Annual Return Form 990. Note that the due date is 4 and a half months after the end of fiscal year. On the Payments and History page, click on the Membership tab. 4. On the Membership page, click on the Upgrade Membership link. Current Non-Profit Entities Filing IRS Tax Form 990 with the Attorney General. If "Yes," complete Part I of Schedule L (Form 990 or 990-EZ). Complete if the organization answered "Yes" on Form 990, Part IV, line 33, 34, 35b, 36, or 37. Did the organization undertake any significant program services during the year which were not listed on the prior. 2.