The final days of April will include special performances of three Broadway shows to benefit the Actors' Fund of America. The musical Jane Eyre, at the Brooks Atkinson Theater, will give an extra performance on April 22 at 8 PM. The Rocky Horror Show will offer a show at Circle in the Square on April 26 at midnight. And Lily Tomlin will present her one-person show, The Search for Signs of Intelligent Life in the Universe, at the Booth Theatre on April 29 at 7:30 PM. To purchase tickets for any of these productions, call (212) 221- 7300, ext. 133/134.