Instructions: See Form 990 Thresholds to determine which form to file. Then see Current Form 990 Series for instructions.Check out the nonprofit annual filing requirements with the state, including Nonprofit Registrations, Annual Reports and their due dates. Complete Parts VIII, IX, and X of Form 990. 5. Complete item G in the heading section of Form 990, on page 1. 6. The nonprofit corporation should use its federal identification number to file North Carolina franchise and corporate income tax returns. This guide covers the required filings to maintain a nonprofit corporation in Nebraska. This Nonprofit Audit Guide provides links to the state laws that address audits so that you can determine what your state requires. Form 990 is an information return that most organizations claiming federal tax-exempt status must file yearly with the IRS. For Public Charities: Please go to the IRS website to determine which of the three forms to file: Form 990, Form 990-EZ, or Form 990-N.