To participate in the e-file program, you must first choose the Authorized IRS e-file options that are best for you. An Authorized IRS e-file Provider can be an Electronic Return Originator, Intermediate Service Provider, Transmitter, Reporting Agent or Software Developer. For details refer to e-file Providers Web Page, Form 8633 (PDF), Application to Participate in the IRS e-file Program Publication 1345 (PDF),Handbook for Authorized IRS E-File Providers Individual Income Tax Returns, and Publication 1346 (PDF), Electronic Return File Specifications and Record Layouts for Individual Income Tax Returns