Exempt organizations e-file - Information for large tax-exempt organizations

What additional information is available for large tax-exempt organizations – those that prepare their own returns?

Publication 4163, Modernized e-File (MeF) Information for Authorized IRS e-file Providers for Business Returns PDF, contains an addendum section for the Large Taxpayer filing their own return. The addendum contains important information and includes step-by-step instructions on how to complete the necessary registration and IRS e-file application.